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 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: a flashlight converts chemical energy into light energy. 
Sentence2: PALight Flashlights are the ultimate personal LED flashlights.

Answer: flashlight


Question: Sentence1: If a soil has high permeability, water flows through the soil more freely and may cause chemicals to leach. 
Sentence2: if soil is permeable it may cause chemicals to leach.

Answer:
cause