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 figure out your Facebook password?
 sentence 2: How can I figure out a Facebook password? sentence 1: Can any state secede from United States?
 sentence 2: What, specifically, must occur before any state secedes from the United States today? sentence 1: What is Google panda update 4.2?
 sentence 2: What is Google Panda's update 4.2? sentence 1: What is it like to be a voracious reader?
 sentence 2: How do I learn to love reading?
not same meaning
same meaning
same meaning
same meaning
not same meaning