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 differences in roles: CEO, COO, CXO, CIO, CFO?
 sentence 2: Sheryl Sandberg: How is the role of a COO different from a CEO? sentence 1: Why do there are too many IITians and engineers on Quora?
 sentence 2: IITians on Quora: Why is Quora so popular among IIT under grads? sentence 1: What is one plus two?
 sentence 2: What is one plus one? sentence 1: Do you want to learn English?
 sentence 2: Why do people want to learn English?
not same meaning
not same meaning
not same meaning
not same meaning
not same meaning