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: the Earth revolving around the Sun causes the seasons to change on its axis. 
Sentence2: Because the daylight changes with the seasons, ActiveEarth does, too.

seasons