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: Organic matter is the plant and animal residue in the soil at various stages of decomposition. 
Sentence2: Plant and animal residue increases the amount of nutrients in the soil.

residue