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.

Sentence1: Cells are programmed to divide only a set number of times. 
Sentence2: Cells reproduce asexually, by dividing.
divide

Sentence1: high pressure systems cause clear weather. 
Sentence2: Weather Clear weather usually means good visibility.
clear

Sentence1: Weather changes from season to season. 
Sentence2: Weather causes change to the environment.

Weather