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 the first southern state secede from the union?" whose answer is December 20, 1860.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did the first southern state secede from the union
Useful Output:

Doc 1: Beginning with South Carolina in December 1860, 11 states seceded from the Union after Lincoln's election. Here is the order of state
Doc 2: In December. 1860 South Carolina became the first southern state to secede from the United States. Eventually ten additional southern states left the Union.
Doc 3: South Carolina, the first state to secede, did so on December 20, 1860. No. 2 to leave officially was Mississippi, on January 9, 1861.
Doc 4: January 1861 The South Secedes When Abraham Lincoln, a known opponent of slavery, was elected president, the South Carolina legislature perceived a threat.
Doc 5: On March 14, 1861, senators debated what to do with seats left vacant by their Southern colleagues. Did the states or their representatives have the right to