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: Chemical digestion occurs mainly in the small intestine. 
Sentence2: Enzymes involved in digestion occur mainly in the small intestine.

intestine