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: Sponges are filter feeders. 
Sentence2: Hawksbills feed primarily on filter feeders.
answer:
feeders


question:
Sentence1: Ejaculation allows males to reproduce. 
Sentence2: propelling sperm from the epididymes allows males to reproduce.
answer:
allows


question:
Sentence1: Populations of viruses do not grow through cell division because they are not cells. 
Sentence2: Prokaryotes multiply by simple cell division, forming clones or exact copies of themselves.
answer:

cell