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: if an animal sweats then that animal 's bodily water decreases. 
Sentence2: When an animal regulates their body temperature by releasing water, their bodily water decreases.

SOLUTION: bodily

PROBLEM: Sentence1: erosion causes a river to become deeper and wider. 
Sentence2: On the contrary, the NILE is the longest river in Africa.

SOLUTION: river

PROBLEM: Sentence1: Insulin helps cells take up glucose from the blood. 
Sentence2: The pancreas makes something that helps cells take up glucose from the blood.

SOLUTION:
blood