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: Soil erosion harms farm and grazing lands and increases flooding and desertification. 
Sentence2: When a river floods, that river harms farm and grazing lands.

harms