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: healing requires rest. 
Sentence2: healing requires time.

SOLUTION: healing

PROBLEM: Sentence1: if humans disturb animals in a location then those animals will move to a different location. 
Sentence2: The human being is self-aware.

SOLUTION: humans

PROBLEM: Sentence1: Pollution One of the ways habitat is degraded is by pollution. 
Sentence2: Riding a bike will not degrade habitat.

SOLUTION:
degraded