user: Question: Who was the previous champion of the title won on July 7, 2010?
Columns: ['Championship', 'Champion(s)', 'Previous champion(s)', 'Date Won', 'Location']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['IWA Undisputed World Heavyweight Championship', 'Bonecrusher', 'Jay-Cobs', 'January 29, 2012', 'Bayamón, Puerto Rico']
SQL:

assistant: SELECT "Previous champion(s)" FROM "Table" WHERE "Date Won" = 'July 7, 2010';