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.

[Q]: Sentence1: Producers make food from inorganic molecules. 
Sentence2: Decomposition is the breakdown of organic molecules into inorganic molecules.
[A]: inorganic


[Q]: Sentence1: Proper digestion is vital for nutrient absorption. 
Sentence2: Digestion is important for an animal's survival.
[A]: digestion


[Q]: Sentence1: Antigens are found on cancer cells and the cells of transplanted organs. 
Sentence2: Examples of animal organs are kidneys and hearts.
[A]:
organs