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: Flies are insects with two wings. 
Sentence2: Flies are arthropods with two wings.
answer:
Flies


question:
Sentence1: All sharks are predators. 
Sentence2: hiding can be used for avoiding sharks.
answer:
sharks


question:
Sentence1: Fungi are aerobic organisms. 
Sentence2: Oxygen is essential for fungi cellular respiration.
answer:

Fungi