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: Antibiotics and vaccines are being stockpiled as Britain gears up to meet the bioterrorism threat. 
Sentence2: Antibiotics and vaccines are being stockpiled against another potential threat in the environment.
[EX A]: Antibiotics

[EX Q]: Sentence1: Plants live just about everywhere on Earth. 
Sentence2: epiphytes live everywhere on earth.
[EX A]: everywhere

[EX Q]: Sentence1: heating salt water causes the water to evaporate while the salt remains. 
Sentence2: When water evaporates, salts in the water remain and become more concentrated.
[EX A]:
water