You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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.

Sentence1: pesticides cause pollution. 
Sentence2: pollution can harm animals.
Solution: pollution.
Why? The word "pollution" is common to Sentence1 and Sentence2. So, it's a good answer.

New input: Sentence1: Ground tissue makes up most of the interior of a plant. 
Sentence2: Vascular tissue and the roots involved can draw water into the plant from the ground.
Solution:
Ground