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: Fine particulates are tiny pieces of soot and dust that lodge deeply in the lungs. 
Sentence2: smog contains tiny pieces of soot and dust.

dust