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.

[Q]: Sentence1: dew is formed when water vapor condenses over night. 
Sentence2: When water vapor condenses overnight, the temperature has reached the dew point.
[A]: condenses


[Q]: Sentence1: Flies are insects with two wings. 
Sentence2: Flies are arthropods with two wings.
[A]: Flies


[Q]: Sentence1: if the amount of available food and water decreases in an environment then animals may leave that environment to find food and water. 
Sentence2: If an environment is experiencing a drought then animals may leave that environment.
[A]:
animals