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 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 south carolina secede from the union
Useful Output:

Doc 1: Following the election of President Abraham Lincoln, South Carolina seceded from the Union on December 20, 1860, becoming the first state to do
Doc 2: By the election of 1860, the United States is so bitterly divided that three southern states vow to secede from the Union if Abraham Lincoln
Doc 3:  South Carolina became the first senator to leave the Senate to support the Confederacy. On December 20 South Carolina seceded from the Union. That same day
Doc 4: December 20, 1860, the day in Charleston on which delegates at the South Carolina state convention voted unanimously to secede from the Union.
Doc 5: The Secession of South Carolina. December 24, 1860. The  On this date, the House received a letter announcing South Carolina's secession from the Union.