sentence 1: How do I build my profile for top B-schools?
 sentence 2: How do I build my profile for Harvard, Wharton, INSEAD etc.? sentence 1: What is your worst flying experience?
 sentence 2: What was your worst experience on a plane? sentence 1: Can the PS4 be connected to an Optimum WiFi?
 sentence 2: How do I connect to WiFi using C++? sentence 1: How can we extend hidden Markov model to handle omitted characters?
 sentence 2: Why hidden Markov model can't handle omitted characters?
same meaning
same meaning
not same meaning
not same meaning