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: a pan is used for cooking food by heating food in it on a stove. 
Sentence2: Chicken and potatoes can be cooked in a pan on the stove.

pan