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: Pasteurization was discovered by the French scientist, Louis Pasteur. 
Sentence2: A French scientist discovered how to reduce the amount of bacteria in milk.

scientist