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: Eggs, butter or margarine keep in the cooler as they do in the refrigerator. 
Sentence2: fat that is a solid at room temperature can be kept in the cooler.

keep