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

Answer: humans


Question: Sentence1: Cows are social animals. 
Sentence2: when a cow moves, chemical energy is converted to mechanical energy.

Answer: Cows


Question: Sentence1: ink is used for hiding from predators by octopuses. 
Sentence2: Predators Predators of octopuses include sharks, whales, seals, large fish, eels and humans.

Answer:
predators