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: heating salt water causes the water to evaporate while the salt remains. 
Sentence2: heating oceans causes the H2O to evaporate while the NaCl remains.

salt