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: Which are some must read books?
 sentence 2: What are some must read books for people in their 20s? sentence 1: Which is the fastest car in 2016?
 sentence 2: What is the fastest production car in 2016?
same meaning
same meaning
same meaning