14. A method comprising; receiving a word problem; using sentence boundary detection, automatically dividing said word problem into sentences; identifying a first question from said word problem; identifying contextual phrases from said word problem, said contextual phrases comprising a portion of said sentences and providing context for said question; identifying first types for each phrase of said contextual phrases; identifying a referring phrase in said first question; identifying a second type for said referring phrase; creating a replacement phrase comprising phrases of said contextual phrases having first type matching said second type; producing a reformulated question by replacing said referring phrase in said first question with said replacement phrase; inputting said reformulated question to a question-answering (QA) system; receiving answers to said reformulated question from said QA system; and creating a second question by incorporating one or more answers to said reformulated question into said first question, said second question comprising one of: an interrogative word question, a yes-no question, and a multiple-choice question.
16. The method according to claim 14 , said identifying contextual phrases from said word problem comprising: identifying said contextual phrases using named entity recognition.