You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "new states may be admitted to the united states only if they are approved by?" whose answer is Congress.
Each document should contain about 30 words, and these documents should contain useful information.

Query: how new states are admitted to the united states
Useful Output:

Doc 1: The U.S. Congress—both House and Senate—pass, by a simple majority vote, a joint resolution accepting the territory as a state. The President of
Doc 2: States formed after the colonies. Since the first 13 states ratified the Constitution, 37 new states have been added by Congress. The
Doc 3: 'As long as both houses of Congress pass a resolution to make a state, and the President signs that resolution, then the state can be admitted.'.
Doc 4: Six states joined the. Union without first being organized as a territory: California, Kentucky, Maine, Texas, Vermont, and West Virginia. The
Doc 5: The short answer is that Congress passes a federal law. The admission of new states is governed by Article IV, section 3 of the Constitution.