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: carpooling decreases the amount of cars used to travel to a place. 
Sentence2: Carpooling leads to less emissions and less pollution.

carpooling