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: Fossils are the remains of ancient plant and animals or the traces of their activities. 
Sentence2: The remains of plants and animals are found where they used to live.

plant