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: friction causes the temperature of an object to increase. 
Sentence2: Friction causes the temperature of a toy to increase.
[EX A]: causes

[EX Q]: Sentence1: Ground tissue makes up most of the interior of a plant. 
Sentence2: ground tissue makes up most of the interior of a dandelion.
[EX A]: Ground

[EX Q]: Sentence1: an earthquake causes the ground to shake. 
Sentence2: Flooding is a major concern, volcanoes threaten to erupt, and earthquakes can potentially cause destruction through ground shaking or liquefaction.
[EX A]:
earthquake