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 are some best movies of all time?
 sentence 2: Which is best movie in history? sentence 1: How has the role of the computer in education changed over the past 25 years?
 sentence 2: What changes can we expect in education systems in the next 50 years? sentence 1: Why should I wear underwear?
 sentence 2: Why do we wear underwear?
same meaning
same meaning
not same meaning
same meaning