sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: Evolution: Why do people from different races(or region) have different facial features?
 sentence 2: Why is there a facial difference in people with different races? sentence 1: Why is homosexuality not a disease?
 sentence 2: Is homosexuality associated with certain diseases or other health issues? sentence 1: What are the saddest break up stories?
 sentence 2: How come we broke up but nothing changed?
not same meaning
same meaning
not same meaning
not same meaning