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: a warm front causes cloudy and rainy weather. 
Sentence2: Stratus clouds are associated with a warm front.

SOLUTION: front

PROBLEM: Sentence1: Crops are plants that are grown for food or other uses. 
Sentence2: insects destroy plants.

SOLUTION: plants

PROBLEM: Sentence1: Heat and temperature are the same thing. 
Sentence2: temperature can change the state of matter.

SOLUTION:
temperature