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.

[EX Q]: Sentence1: the force of water against the seed coat causes a root to emerge from a seed.
Sentence2: Germination depends on the seed coat.
[EX A]: coat

[EX Q]: Sentence1: exercise increases a body 's strength.
Sentence2: Exercise is more than running and lifting.
[EX A]: exercise

[EX Q]: Sentence1: Viruses cause many human diseases.
Sentence2: Influenza causes human disease.
[EX A]:
diseases