sentence 1: How do I build my profile for top B-schools?
 sentence 2: How do I build my profile for Harvard, Wharton, INSEAD etc.? sentence 1: What is the best site for downloading e-books?
 sentence 2: What are the best sites for downloading e-books? sentence 1: What are some music videos of personal stories of domestic violence?
 sentence 2: What are some music videos featuring a domestic violence storyline? sentence 1: What is the nicest thing a stranger has done for you?
 sentence 2: What's the nicest thing you've done for a stranger?
same meaning
same meaning
same meaning
not same meaning