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: dew is formed when water vapor condenses over night. 
Sentence2: When water vapor condenses overnight, the temperature has reached the dew point.

SOLUTION: condenses

PROBLEM: Sentence1: Diurnal cycles Diurnal cycles are the daily cycles of light and darkness. 
Sentence2: Plants detect and respond to diurnal cycles.

SOLUTION: Diurnal

PROBLEM: Sentence1: Seed pods and seeds can be transported by floodwater or eaten by animals and spread in their manure. 
Sentence2: Seeds stuck to animal fur can spread.

SOLUTION:
spread