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.

[EX Q]: Sentence1: Most soil nutrients are cations. 
Sentence2: decomposition increases the amount of cations in the soil.
[EX A]: cations

[EX Q]: Sentence1: Producers use energy and inorganic molecules to make food. 
Sentence2: Green plants use energy and inorganic molecules to make food.
[EX A]: energy

[EX Q]: Sentence1: DNA DNA is deoxyribonucleic acid. 
Sentence2: deoxyribonucleic acid contains genetic instructions.
[EX A]:
acid