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.

Input: Consider Input: 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.

Output: made


Input: Consider Input: Sentence1: nectar is used for attracting pollinators by plants. 
Sentence2: butterflies pollinate plants.

Output: plants


Input: Consider Input: Sentence1: a greenhouse is used to protect plants from the cold. 
Sentence2: A greenhouse is used to protect flowers from the cold.


Output: cold