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.

Sentence1: Insects have 2 antennae. 
Sentence2: Insects have 2 appendages to detect sound.
2

Sentence1: wiring requires an electrical conductor. 
Sentence2: Gold is an excellent conductor of electricity.
conductor

Sentence1: Earth is a world of water. 
Sentence2: The moon revolving around the world causes the moon phases.

world