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: Hydrothermal vents are powered by the heat of submarine volcanoes. 
Sentence2: Organisms cluster around formations in the ocean floor powered by the heat of submarine volcanoes.

heat