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: Amphibians have permeable skin that easily absorbs substances from the environment. 
Sentence2: permeable skin easily absorbs air to breathe through.
[A]: absorbs


[Q]: Sentence1: bacteria can cause people to become ill. 
Sentence2: bacteria can cause people to die.
[A]: bacteria


[Q]: Sentence1: a long tail can be used to move through water by an animal. 
Sentence2: Salamanders can move through water.
[A]:
can