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: Bile reduces the acidity of food entering from the highly acidic stomach. 
Sentence2: Bile acts as a base on the food entering the stomach.

stomach