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: adding salt to a liquid decreases the melting point of that liquid. 
Sentence2: A low melting point will lower the heat needed.

melting