In this task, you're given an open-domain question. Your task is to provide an answer to the given question. There is only one unique answer for each question. Your answer should be short, and refer to an entity, date, number, etc. Do not put your answer in the context of a sentence.

When was the last time the us constitution changed?
May 5, 1992

What are the 5 main characteristics of a mineral?
Formed by a natural process, Stable or metastable at room temperature, Represented by a chemical formula, Ordered atomic arrangement, and Usually abiogenic

Number of starbucks stores in the united states?

13,352