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: dew is formed when water vapor condenses over night. 
Sentence2: dew is formed when cooling  over night.
[A]: dew


[Q]: Sentence1: Introns are regions that do not code for proteins. 
Sentence2: regions that do not code for proteins are removed by RNA splicing.
[A]: code


[Q]: Sentence1: Sperm pass out of the body through the urethra. 
Sentence2: Sperm pass out of the body through a single tube that runs to the penis.
[A]:
Sperm