sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: How do you deny copyrighted audio materials not to be downloaded from your website?
 sentence 2: How does YouTube stop the copyright materials from being uploaded on YouTube? sentence 1: Which would you prefer, Wayfarers or Aviators? Why?
 sentence 2: Which is better: the original or new Ray-Ban Wayfarers? sentence 1: If a girl played with troll dolls back in the 80's, what toy did a boy play with during that era?
 sentence 2: What toy did a boy play with in the 80's if a girl played with troll dolls?
not same meaning
not same meaning
not same meaning
same meaning