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: some light bulbs convert electricity into light and heat energy. 
Sentence2: some light bulbs convert electricity into light and the amount of energy in a substance.

some