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.

[Q]: Sentence1: if an object is made of a material then that object has the properties of that material. 
Sentence2: An object is an item in the real world.
[A]: object


[Q]: Sentence1: Bees feed on nectar and pollen. 
Sentence2: Plant reproduction often requires bees and nectar.
[A]: Bees


[Q]: Sentence1: Halogen light bulbs generate heat. 
Sentence2: Halogen bulbs convert electricity into heat.
[A]:
Halogen