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


question:
Sentence1: Eggs are usually laid in a nest. 
Sentence2: birds have nests.
answer:
nest


question:
Sentence1: uneven heating of the Earth 's surface cause wind. 
Sentence2: If the wind is less, then most kites have problems flying.
answer:

wind