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: Plants that shed their leaves seasonally each year are called deciduous plants. 
Sentence2: vines shed their leaves seasonally each year.
[A]: each


[Q]: Sentence1: Reproduction is the process by which living things give rise to offspring. 
Sentence2: Reproduction is the process by which living things give birth to babies.
[A]:
Reproduction