nlp

Question Answering (QA)

nlp664-week14

Posted by renjie on April 12, 2020


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