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: 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: Chromosomes are the form of the genetic material of a cell during cell division. 
Sentence2: Microtubules move the genetic material of a cell during cell division.
[A]: cell


[Q]: Sentence1: Cnidarians are radial, tentacled animals that live mostly in the seas. 
Sentence2: Jellyfish and corals are radial, tentacled animals that live mostly in the seas.
[A]:
animals