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: microscope is used to see small things by biologists by making them appear bigger. 
Sentence2: Something invented by Leeuwenhoek is used to see small things by biologists by making them appear bigger.

A: appear
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Q: Sentence1: Asbestos is a dangerous carcinogen. 
Sentence2: Asbestos causes cancer.

A: Asbestos
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Q: Sentence1: Ground tissue fills the space between the dermal tissue and the vascular tissues. 
Sentence2: between the dermal tissue and the vascular tissues lies most of the interior of a plant.

A:
between
****