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: an automobile engine transforms chemical energy into mechanical energy. 
Sentence2: cars transform chemical energy into mechanical energy.
[EX A]: chemical

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

[EX Q]: Sentence1: All plants have a characteristic life cycle that includes alternation of generations. 
Sentence2: Plant and animal life cycles are detailed, including birth, growth, reproduction, and death.
[EX A]:
includes