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: Only as long as there are batteries in the flashlight, the flashlight will function. 
Sentence2: Chemical energy converted to light energy requires batteries.

batteries