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: Ground tissue makes up most of the interior of a plant. 
Sentence2: ground tissue makes up most of the interior of a dandelion.

A: Ground
****
Q: Sentence1: After a seed is planted it is watered. 
Sentence2: seeds need water.

A: seed
****
Q: Sentence1: Ice Ages are rare in geologic history. 
Sentence2: something rare in geologic history buried the planet in snow for millions of years.

A:
geologic
****