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: Sperm had to swim from male to female reproductive organs for fertilization. 
Sentence2: If fertilized, the egg implants itself in the uterus.

SOLUTION: fertilization

PROBLEM: Sentence1: Endospores are commonly found in soil and water. 
Sentence2: Dirt is really misplaced soil.

SOLUTION: soil

PROBLEM: Sentence1: Food is easier to chew because it is moistened by saliva from the salivary glands. 
Sentence2: Food is easier to chew because it is moistened by liquid.

SOLUTION:
Food