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: Finally, the fluid in the nephron reaches a collecting duct .
Sentence2: fluid in the kidneys collect into ducts.

SOLUTION: fluid

PROBLEM: Sentence1: a switch is used to start the flow of current in an electrical circuit.
Sentence2: The flow of electrical current powers a light bulb.

SOLUTION: current

PROBLEM: Sentence1: exercise has a positive impact on a human 's health.
Sentence2: Endurance exercises Endurance exercises include cycling, running, and swimming.

SOLUTION:
exercise