Definition: Generate an overlapping word between the given two sentences. When you find the overlapping words, they don't have to match exactly, e.g., "survival" and "survive" are valid overlapping words. Little words like "the" or "of" don't count! You must generate significant words which are not the stop words.
Input: Sentence1: Black Holes Black holes are the inevitable conclusion of Einstein's General Theory of Relativity. 
Sentence2: When a high-mass star collapses, it fulfills the inevitable conclusion Einstein's General Theory of relativity.

Einstein's