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: waxy leaves are used for storing water by some plants. 
Sentence2: waxy leaves are used for water conservation by some plants.
[EX A]: leaves

[EX Q]: Sentence1: Minerals are chemical elements that are essential for body processes. 
Sentence2: Eggs are loaded with vitamins and minerals.
[EX A]: Minerals

[EX Q]: Sentence1: Oxygen is now penetrating the soil, increasing microbial activity. 
Sentence2: looseness of soil increasing microbial activity.
[EX A]:
activity