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: Mammals depend on the vegetation for food and shelter. 
Sentence2: Mammals are Heterotrophs.
[EX A]: Mammals

[EX Q]: Sentence1: Ribosomes are structures in the cytoplasm where proteins are made. 
Sentence2: prokaryotes can make proteins.
[EX A]: made

[EX Q]: Sentence1: fat is used to keep animals warm. 
Sentence2: With a thick fur coat and 4 inches of fat a bear stays warm.
[EX A]:
warm