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: creating paper requires cutting down trees. 
Sentence2: Rainforests are destroyed by logging and all of the trees are cut down.
[EX A]: cutting

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

[EX Q]: Sentence1: Chemical weapons are toxic chemicals. 
Sentence2: Toxic materials that splash on a human can cause harm.
[EX A]:
toxic