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: "Who was appointed the seat left vacant by a former Las Vegas, Nevada politician in the United States Senate Election in Nevada 2012?" whose answer is Dean Heller.
Each document should contain about 30 words, and these documents should contain useful information.

Query: U.S. Senate election in Nevada 2012
Useful Output:

Doc 1: Republicans have won their target number of competitive seats and have secured control of the Senate. All Senate races.
Doc 2: At present, 45 states authorize their governors to appoint a Senator to fill a vacancy until a replacement is elected. Five states, however,
Doc 3: The 2012 United States Senate election in Nevada was held on Tuesday, November 6, 2012, concurrently with elections to the United States Senate in other
Doc 4: The 2012 United States Senate elections were held on November 6, 2012, with 33 of the 100 seats in the Senate, all Class 1 seats, being contested in regular
Doc 5: Information in this table may not include the most recently submitted filings. Congressional committee reports: Quarterly filing and pre-/post-election reports.