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: evaporation can be used for separating a solute from a solvent in a solution. 
Sentence2: Heating liquids can be used to separate a solute from a solvent in a solution.

solvent