Natural Language Processing
➜ some other AI courses
Processing language is one of the most important and most challenging issues of Artificial Intelligence. NLP (Natural Language Processing) has many applications. It is commonly used in machine translation, in text mining, in speech recognition, in dialogue based applications, in text generation, in automatic summarization, in Web search, etc. Conversely, it is hard to imagine an "intelligent" machine that would be unable to understand language.
NLP remains a challenging task. Statistical techniques perform well in domains such as machine translation, but they are intrinsically limited to average meanings and cannot take contextual knowledge into account. This course explores some symbolic alternatives to mere statistics.
Some NLP techniques, like grammars, parsing and ontologies, are classic symbolic methods. Some others are inspired by cognitive modelling. They include procedural semantics, aspect processing, dialogue processing. The point is not only to adopt a "reverse engineering" approach to language, but also to adapt engineering techniques to human requirements to improve efficiency and acceptability.
This course presents different NLP methods that are inspired by the study of natural language and of the underlying cognitive processes. However, the techniques and concepts that will be studying have a broader scope in artificial intelligence and are used to study reasoning, decision making and symbolic machine learning. They include:
- Syntactic processing using context-free grammars. Basic parsing methods.
- Knowledge representation – Meaning representation – Procedural semantics – Aspect.
- Relevance: interest, newsworthiness, argumentative relevance and processing.
SD206 (Logic and knowledge representation) is recommended, but not required.
Labs are currently being translated into Python (so that both Python and Prolog versions will be available).
Basic notions about Prolog will nevertheless be useful to know (unification, recursion, backtracking, declarativity).
Introduction to symbolic NLP - Parsing techniques
Introduction to linguistics
application of knowledge bases,
Contrast and aspect
Relevance and argumentation
XAI: explainable Artificial Intelligence
Project, Quiz & evaluation
1. Syntax & parsing
11/05/2022 ➜ 17/05/2022
2. Procedural Semantics
25/05/2022 ➜ 31/05/2022
3. Processing aspect
01/06/2022 ➜ 07/06/2022
4. Relevance and argumentation
08/06/2022 ➜ 14/06/2022
Students are asked to complete the exercises of each session within 7 days.
- Answers to questions during lab sessions will be recorded and evaluated.
- Students will be asked to perform a small technical study (in pairs) by extending some issue addressed during lab sessions. They will also write a 3-4 page report (more if working in pairs, of course).
- Students will answer a small quiz.
Each student will choose a problem related to the above topics and perform a micro-research on that problem. Students will write a 3-page paper (typical structure: problem, relevant studies, claim, evidence, discussion, bibliography (with weblinks)).
Note: the project should include some programming (this is a computer science course). So pure bibliographic projects would not suffice.
The study should be related to symbolic NLP.
The easiest way to do this study is to work on a topic closely related to one of the lab work sessions. You are free, however, to work on any other relevant topic. Be careful to keep it feasible: it’s supposed to be a mini-study.
Caveat: if your study involves statistical aspects, only the symbolic part will be considered in the evaluation.
Implementation language should be Prolog or Python (ask in case of problem).
Examples: Extend a grammar to analyze more complex sentences (such as the fist sentence of this section); create a grammar for a different language; extend the lab work on procedural semantics to understand more sentences about chess; or to understand sentences about the genealogy of an actual family; extend the lab work on aspect to include more aspectual words (always, ancient, already, still, ...); create a mini-knowledge base on a specific domain (football, Roland-Garros...) and use CAN (last lab work) to propose interactive dialogues; etc.Students may work in pairs
. In this case, the respective contributions of each student should appear unambiguously. And the expectations are of course doubled.
Your small report will describe your project and what you found
(typically: 2 or 3 pages of text). Don’t forget to use the template (see above).
The project itself can be handed in until June 29th.
- your report
- your source code
- any suitable additional material
Please provide any useful comment about the course.
Introduction to AI
- Konieczny, S. & Prade, H. (2021). Artificial Intelligence - What is it, exactly? College Publications.
- Marquis, P., Papini, O. & Prade, H. (2020). A Guided Tour of Artificial Intelligence Research: Volume I: Knowledge Representation, Reasoning and Learning. Springer Nature.
- Marquis, P., Papini, O. & Prade, H. (2020). A Guided Tour of Artificial Intelligence Research: Volume II: AI Algorithms. Springer Nature.
- Marquis, P., Papini, O. & Prade, H. (2020). A Guided Tour of Artificial Intelligence Research: Volume III: Interfaces and Applications of Artificial Intelligence. Springer Nature.
Introduction to NLP
- A short introduction to syntax:
Lasnik, H. (2002). The minimalist program in syntax. Trends in cognitive sciences, 6 (10), 432-437.
- Another introduction to syntax:
Gerold Schneider. Introduction to Government and binding
- About feature structures and unification: See these slides taken from:
Bender, E. M., Sag, I. A. & Wasow, T. (2003). Syntactic theory: A formal introduction. CSLI, Stanford, CA.
- About using Prolog to process natural language:
Natural Language Processing Techniques in Prolog by Patrick Blackburn and Kristina Striegnitz
- About using Python (NLTK) to process natural language:
- Bird, S., Loper, E. & Klein, E. (2009). Natural Language Processing with Python. O’Reilly Media Inc.
- Zhang, Y. & Teng, Z. (2021). Natural Language Processing: A Machine Learning Perspective. Cambridge University Press.
- The Attempto Project: a rich subset of standard English designed to serve as knowledge representation language.
About the limits of statistical AI
- Mitchell, M. (2021). Why AI is harder than we think. 16th Conf. of the European Chapter of the Association for Computational Linguistics (EACL 2021), (starts at 19:30). .
- Difficulty of interpreting in context:
Scott, T. (2020). The Sentences Computers Can’t Understand -
- Critique of statistical translation:
Hofstadter, D. R. (2018). The shallowness of Google Translate. The Atlantic, Jan, 30.
(voir aussi cette critique de l’apprentissage profond)
- Dessalles, J.-L. (2019). Des intelligences très artificielles. Paris: Odile Jacob.
- Marcus, G. (2018). Deep learning: A critical appraisal. ArXiv, 1801.006.
- Marcus, G. (2020). The next decade in ai: Four steps towards robust artificial intelligence. ArXiv, 2002.062.
- Marcus, G. (2020). GPT-2 and the Nature of Intelligence. The Gradient.
- Marcus, G. & Davis, E. (2020). GPT-3, Bloviator: OpenAI’s language generator has no idea what it’s talking about. MIT Technology review.
- Gärdenfors, P. (2000). Conceptual spaces: The geometry of thought. Cambridge, MA: MIT Press.
- Gärdenfors, P. (2001). Conceptuel spaces as a basis for cognitive semantics. In A. Clark, J. Ezquerro & J. M. Larrazabal (Eds.), Philosophy and Cognitive Science: Categories, Consciousness, and Reasoning: Proceeding of the Second International Colloquium on Cognitive Science, 159-180. New York, NY: Springer Science & Business Media.
- Gärdenfors, P. & Williams, M.-A. (2001). Reasoning about categories in conceptual spaces. International Joint Conference on Artificial Intelligence (IJCAI), 385-392. .
- Gärdenfors, P. (2014). The geometry of meaning - Semantics based on conceptual spaces. Cambridge, MA: MIT Press.
- Moens, M. & Steedman, M. (1998). Temporal ontology and temporal reference. Computational Linguistics, 14 (2), 15-28.
- Munch, D. & Dessalles, J.-L. (2014). Assessing Parsimony in Models of Aspect. In P. Bello, M. Guarini, M. McShane & B. Scassellati (Eds.), Proceedings of the 36th Annual Conference of the Cognitive Science Society, 2121-2126. Austin, TX: Cognitive Science Society.
- Doran, D., Schulz, S. & Besold, T. R. (2017). What does explainable AI really mean? A new conceptualization of perspectives. ArXiv, 1710.008.
- Wang, D., Yang, Q., Abdul, A. & Lim, B. Y. (2019). Designing theory-driven user-centric explainable AI. Proceedings of the 37th international conference on Human factors in computing systems (CHI’19), paper 601. ACM.