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: if an object is made of a material then that object has the properties of that material. 
Sentence2: items properties are the same as the materials the item is made of.
answer:
made


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


question:
Sentence1: Geckos are, in fact, reptiles. 
Sentence2: Geckos have good eyesight.
answer:

Geckos