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: Each step along a food chain is known as a trophic level. 
Sentence2: Many consumers feed at more than one step along a food chain.

chain