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: pathogens can cause disease. 
Sentence2: pathogens affects the immune system.
[EX A]: pathogens

[EX Q]: Sentence1: Blood pH may become unbalanced if the rate of breathing is too fast or too slow. 
Sentence2: If Someone Is Hyperventilating Hyperventilation is caused by breathing too deeply, too fast.
[EX A]: breathing

[EX Q]: Sentence1: Animals adapt to cold temperatures. 
Sentence2: Adaptation living things adapt to their environment.
[EX A]:
adapt