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: Viruses contain DNA but not much else. 
Sentence2: viruses contain encoded information but not much else.
[A]: Viruses


[Q]: Sentence1: air pollution can cause the pH of soil to decrease. 
Sentence2: Acidity is measured with a pH meter or with pH paper strips.
[A]: pH


[Q]: Sentence1: Plastic is an insulator of electricity. 
Sentence2: Plastic slows the transfer of electricity.
[A]:
Plastic