Question Answering (QA)
Two-Step
- use IR to retrieve relevant documents
- apply NLP to find the answer
Question Classification
Answer Processing
不同question不同方法
不常规的问题特殊解决（手动做model等）
给answers打分，然后选rank最高的
IBM watson
Questions Requiring Complex Answers
Two-stage QA model.
-
Passage retrieval using expanded query representation
-
Selection of answer-providing passages based on generic + specialized entities & relations
Conversational Agents
Rule-based chatbots
Frame-based Dialog Agent
