user: Question: What competition had its first match on December 20, 2007?
Columns: ['Competition', 'Started Round', 'Final Position', 'Final Round', 'First Match', 'Last Match']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Serie A', 'Round 1', '5th', 'Round 38', 'August 26, 2008', 'May 18, 2008']
SQL:

assistant: SELECT "Competition" FROM "Table" WHERE "First Match" = 'December 20, 2007';