You are given a list of queries separated by new line. Your job is to answer with the query that is the most well-formed or well-structured query in terms of grammar, punctuations, or spelling errors.

What date did the Gaza problem start ?
What causes a cell to swell necause of osmosis ?
What is Earthquake P waves ?
What is difference between a grand hury and a petit jury ?
What date did the Gaza problem start ?