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: Marine dolphins are endangered by fishing nets, speedboats, and pollution. 
Sentence2: dolphins live mainly in shallow coastal waters.

SOLUTION: dolphins

PROBLEM: Sentence1: Flies are insects with two wings. 
Sentence2: Flies are arthropods with two wings.

SOLUTION: Flies

PROBLEM: Sentence1: Kidney dialysis depletes carnitine. 
Sentence2: Treating kidney failure  depletes carnitine.

SOLUTION:
carnitine