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: Roundworms make up the phylum Nematoda. 
Sentence2: Also, nematoda and rotifera are important groups contributing to soils.
[A]: Nematoda


[Q]: Sentence1: the emission of sulfur dioxide causes acid rain. 
Sentence2: the emission of sulfur dioxide causes soil weathering.
[A]: causes


[Q]: Sentence1: Major crops are corn, peanuts, soybeans and horticultural crops. 
Sentence2: Insects can spread disease to things such as corn, peanuts and soybeans.
[A]:
corn