sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: What happens if someone rejects your Facebook friend request, can you send it again?
 sentence 2: If a friend request is declined can I send it again? sentence 1: Are the telescopes on Maunakea open for public viewing at night?
 sentence 2: What are some interesting facts about Maunakea?
not same meaning
same meaning
not same meaning