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: "when did national conventions begin in american politics?" whose answer is 1831.
Each document should contain about 30 words, and these documents should contain useful information.

Query: first national party convention in american politics
Useful Output:

Doc 1: The first national political convention in America was held in 1831 by a long-forgotten group, the Anti-Masonic Party.
Doc 2: Between 1848 and 2012, nearly one of every four major national political party conventions was held in Philadelphia.
Doc 3: But presidential nominating conventions of the past were once dispositive—nominees were determined at the convention by the delegates, and not
Doc 4: Some "Firsts" and Interesting Facts at Presidential Nominating Conventions and Presidential Elections. 1836. Democratic Vice President Richard Johnson was
Doc 5: On May 21, 1832, a group of delegates supporting President Andrew Jackson met in Baltimore to conduct the first official convention of the Democratic Party.