instruction:
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.
question:
Sentence1: Evaporation of sweat uses energy, and the energy comes from body heat. 
Sentence2: Evaporation of sweat uses energy, and the energy comes from exercise.
answer:
Evaporation


question:
Sentence1: Algae have varied life cycles. 
Sentence2: And fish eat algae.
answer:
Algae


question:
Sentence1: Plasma cells are activated B cells that secrete antibodies. 
Sentence2: Plasma cells are activated B cells that secrete warriors.
answer:

B