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: Arthropods Arthropods have jointed segmented exoskeletons. 
Sentence2: Insects have jointed segmented exoskeletons.
[A]: exoskeletons


[Q]: Sentence1: Ribosomes are structures in the cytoplasm where proteins are made. 
Sentence2: prokaryotes can make proteins.
[A]: made


[Q]: Sentence1: a light bulb requires electrical energy to produce light. 
Sentence2: Energy-saving is important when electrical energy is used to produce light.
[A]:
electrical