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.

[EX Q]: Sentence1: An organism can gain energy by assimilation or absorption of food. 
Sentence2: Organisms require food for growth.
[EX A]: food

[EX Q]: Sentence1: boiling is when liquids are heated above their boiling point. 
Sentence2: If the pressure is reduced, the boiling point is lowered.
[EX A]: boiling

[EX Q]: Sentence1: transpiration is when water vapor moves from plants into the atmosphere. 
Sentence2: Transpiration is when water vapor moves from plants into the blanket of air around the earth.
[EX A]:
from