11 Information extraction (named entity extraction and question answering)
This chapter covers
- Sentence segmentation
- Named entity recognition (NER)
- Numerical information extraction
- Part-of-speech (POS) tagging and dependency tree parsing
- Logical relation extraction and knowledge bases
One last skill you need before you can build a full-featured chatbot is extracting information or knowledge from natural language text.
11.1 Named entities and relations
You’d like your machine to extract pieces of information and facts from text so it can know a little bit about what a user is saying. For example, imagine a user says “Remind me to read aiindex.org on Monday.” You’d like that statement to trigger a calendar entry or alarm for the next Monday after ...
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