sentence 1: How do I know if I'm good?
 sentence 2: How do I know what I'm good at? sentence 1: What caused the Arab oil embargo?
 sentence 2: Why did the US risk an oil embargo to support Israel in the Yom Kippur war? Why was this tiny country, Israel, so important to the US? sentence 1: What is the spin quantum of a human?
 sentence 2: What is particle spin?
not same meaning
not same meaning
not same meaning