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

SOLUTION: divide

PROBLEM: Sentence1: protein is used to repair cells by the human body. 
Sentence2: Wound healing requires protein.

SOLUTION: protein

PROBLEM: Sentence1: sugar causes food to taste sweet. 
Sentence2: Too many sweets can also cause tooth decay and unhealthy gums.

SOLUTION:
sweet