Nltk


lex & yacc
Graph-based Natural Language Processing and Information Retrieval
Parsing Techniques: A Practical Guide (Monographs in Computer Science)
Principles of Data Mining (Adaptive Computation and Machine Learning)
Speech and Language Processing: An Introduction to Natural Language Processing, Computational Linguistics and Speech Recognition
The Text Mining Handbook: Advanced Approaches in Analyzing Unstructured Data
Foundations of Statistical Natural Language Processing
WordNet: An Electronic Lexical Database (Language, Speech, and Communication)
Web Data Mining: Exploring Hyperlinks, Contents, and Usage Data (Data-Centric Systems and Applications)
Natural Language Processing with Python: Analyzing Text with the Natural Language Toolkit