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: If there is a fierce emotion near a stream, that stream somehow records that. 
Sentence2: when runoff or water seeping out of a spring when there is fierce emotion it can record it.

emotion