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: Any antigen that causes an allergy is called an allergen. 
Sentence2: Allergens can trigger asthma attacks.

A: allergen
****
Q: Sentence1: Dromaeosaurs are part of the theropod group of dinosaurs. 
Sentence2: Birds evolved from a group of bipedal dinosaurs that included Dromaeosaurs.

A: Dromaeosaurs
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Q: Sentence1: Sweat is released from sweat glands beneath the skin, and as it evaporates, the skin is cooled. 
Sentence2: when the body is hot, evaporation is used to cool the body.

A:
evaporates
****