sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: When is the best time to solicit restaurants?
 sentence 2: What is the best time to solicit restaurants? sentence 1: What is the corporate culture like at Unifi? How is the culture different than other companies?
 sentence 2: What is the corporate culture like at Yahoo? How is the culture different than other companies?
not same meaning
same meaning
not same meaning