instruction:
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.
question:
Sentence1: All photos are digital images. 
Sentence2: satellites are used to take photos from space.
answer:
photos


question:
Sentence1: a solution is formed by one substance being dissolved in another substance. 
Sentence2: A solution is formed when limestone is dissolved in ocean water.
answer:
formed


question:
Sentence1: weathering means breaking down rocks from larger whole into smaller pieces by weather. 
Sentence2: Many weather events involve rain.
answer:

weather