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.

[EX Q]: Sentence1: Ribosomes are small organelles where proteins are made. 
Sentence2: Ribosomes are assembled inside the nucleus.
[EX A]: Ribosomes

[EX Q]: Sentence1: intense heat has a negative impact on an organism. 
Sentence2: intense heat has a negative impact on plants.
[EX A]: heat

[EX Q]: Sentence1: insect bites cause harm to living things. 
Sentence2: Insect repellents are used against flea bites.
[EX A]:
insect