TASK DEFINITION: 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.
PROBLEM: Sentence1: condensing causes a liquid to form. 
Sentence2: Air carries moisture that causes a liquid to form.

SOLUTION: causes

PROBLEM: Sentence1: Weather today is said to be sunny and clear. 
Sentence2: High pressure systems cause it to be sunny.

SOLUTION: sunny

PROBLEM: Sentence1: when sound reaches the ear , that sound can be heard. 
Sentence2: When vibrations reach our ears, they can be heard.

SOLUTION:
can