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.
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Question: Sentence1: if a neutral atom loses an electron then an atom with a negative charge will be formed. 
Sentence2: Ice crystals that are formed have a negative charge.

Answer: charge


Question: Sentence1: Carpools and vanpools can save time. 
Sentence2: vanpools decrease the amount of cars used to travel to a place.

Answer: vanpools


Question: Sentence1: Ribosomes are small organelles where proteins are made. 
Sentence2: Cells lacking membrane-bound organelles are prokaryotic, and bacteria are prokaryotes.

Answer:
organelles