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: Oxygen fatigue is a shortage of oxygen reaching the brain. 
Sentence2: Plants can reduce fatigue during the daytime.
answer:
fatigue


question:
Sentence1: Light is the visible form of electromagnetic energy. 
Sentence2: Electromagnetic energy enters the eye through an opening called the pupil.
answer:
electromagnetic


question:
Sentence1: thirst is used to make an animal realize that it needs to replenish its bodily water by the body. 
Sentence2: Water Water in the area's natural water bodies is drinkable as such.
answer:

water