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: Leaves make food for the plant. 
Sentence2: Some producers have leaves to help use energy and inorganic molecules.

A: Leaves
****
Q: Sentence1: rain causes erosion. 
Sentence2: Soil Erosion Soil erosion is what happens when soil is washed or blown away.

A: erosion
****
Q: Sentence1: Cancer is a disease that occurs when the cell cycle is no longer regulated. 
Sentence2: Brain tumors occur when the cell cycle is no longer regulated.

A:
cell
****