TASK DEFINITION: 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.
PROBLEM: Sentence1: air pollution can cause the pH of soil to decrease. 
Sentence2: Acidity is measured with a pH meter or with pH paper strips.

SOLUTION: pH

PROBLEM: Sentence1: Dinosaur bones, like many other artifacts, are fossilized. 
Sentence2: radioactive dating is used to determine the age of dinosaur bones.

SOLUTION: Dinosaur

PROBLEM: Sentence1: Marine biomes are found in the salt water of the ocean. 
Sentence2: Sea tigers are found in the salt water of the ocean.

SOLUTION:
found