sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: Do Quora users still see questions that are marked as needing improvement?
 sentence 2: What happens to questions marked as needing improvement? Are they inhibited from being seen as other questions are? sentence 1: Who is going to win the 2016 US presidential election? Why?
 sentence 2: Who will win the Election? Trump or Clinton?
not same meaning
same meaning
same meaning