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: Aquatic biomes are probably the most important of all the biomes. 
Sentence2: Freshwater ecosystems are one of the more important environments.

important