Teacher:This task is about creating an unanswerable question based on a given passage. Construct a question that looks relevant to the given context but is unanswerable. Following are a few suggestions about how to create unanswerable questions:
(i) create questions which require satisfying a constraint that is not mentioned in the passage
(ii) create questions which require information beyond what is provided in the passage in order to answer
(iii) replace an existing entity, number, date mentioned in the passage with other entity, number, date and use it in the question
(iv) create a question which is answerable from the passage and then replace one or two words by their antonyms or insert/remove negation words to make it unanswerable.
Teacher: Now, understand the problem? Solve this instance: Passage: RIBA is based at 66 Portland Place, Londona 1930s Grade II* listed building designed by architect George Grey Wornum with sculptures by Edward Bainbridge Copnall and James Woodford. Parts of the London building are open to the public, including the Library. It has a large architectural bookshop, a cafe, restaurant and lecture theatres. Rooms are hired out for events.
Student:
What is the former Royal Institute of British Architects' street address?