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: Heat and temperature are the same. 
Sentence2: a thermometer is used to measure heat.
Heat

Sentence1: Food consists of organic molecules that store energy in their chemical bonds. 
Sentence2: Chemical Bonding A chemical bond is the sharing or transfer of electrons.

bonds