sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: What are the best aspects of living in Pésterion, Greece as a young adult?
 sentence 2: What are the best aspects of living in Thessaloniki, Greece as a young adult? sentence 1: Is Barack Obama a US citizen?
 sentence 2: What are the chances that Barack Obama will again become the president of the United States of America in the election of 2016?
not same meaning
not same meaning
not same meaning