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: RNA polymerase joins the RNA nucleotides together. 
Sentence2: DNA contains genetic instructions for proteins where polymerase joins the nucleotides together.

joins