Course pages 2014–15
Introduction to Natural Language Syntax and Parsing
This module aims to provide a brief introduction to linguistics for computer scientists and then goes on to cover some of the core tasks in natural language processing (NLP), focussing on statistical tagging and parsing. We will look at how to evaluate taggers and parsers and see how well state-of-the-art tools perform given current techniques.
- Linguistics for NLP – morphology, syntax, semantics and pragmatics with illustrated application mostly to English [6 lectures, EJB]
- Finite-State/Markovian Techniques – part-of-speech (PoS) tagging, phrase chunking and named entity recognition (NER) [3 lectures, SC]
- Parsing – grammars, treebanks, representations and evaluation, statistical parse ranking [5 lectures, SC]
- Interpretation - compositional semantics and entailment, pragmatic inference [2 lectures, EJB]
On completion of this module students should:
- understand the basic properties of human languages and be familiar with descriptive and theoretical frameworks for handling these properties;
- understand the design of tools for basic NLP tasks such as tagging and parsing and be able to apply them to text and evaluate their performance;
- understand some of the basic principles of the representation of linguistic meaning and interpretative inference.
- Practical Week 6: PoS tag, chunk, and/or perform NER on a designated text with one or more provided tools. Evaluate the performance of the tools quantitatively and qualitatively.
- Practical Week 8: (6 hours) Parse a designated set of sentences with one or more provided tools, to yield representations of their grammatical relations, phrase structure and/or logical forms. Evaluate the performance of the tools quantitatively and qualitatively.
- There will be four ticked, short, take-home assignments on linguistic analysis during weeks 1-3. Each assignment is worth 5% of the final mark.
- An assessed practical report based on the practicals described above. The practical report will consist of a description of the work done of not more than 5000 words. It will contribute 80% of the final mark.
Jurafsky, D. & Martin, J. (2008). Speech and language processing. Prentice-Hall (2nd ed.).