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: Sperm had to swim from male to female reproductive organs for fertilization. 
Sentence2: If fertilized, the egg implants itself in the uterus.
answer:
fertilization


question:
Sentence1: Plants live just about everywhere on Earth. 
Sentence2: epiphytes live everywhere on earth.
answer:
everywhere


question:
Sentence1: Electrical energy refers to energy associated with the flow of electrons. 
Sentence2: Electric devices require the flow of electrons.
answer:

electrons