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: when the seasons change from the summer to the fall , the amount of daylight will decrease. 
Sentence2: when the seasons change from summer to autumn, the amount of daylight will decrease.

seasons