user: Question: The president, Peter Williamson, had how many home grounds?
Columns: ['Team', 'Head Coach', 'President', 'Home Ground', 'Location', 'Founded', 'Website']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Burleigh Heads Bulldogs Soccer Club', 'Colin Phelan', 'Steve Kazmer', 'Pizzey Park, Miami', 'Miami', 1983.0, 'http://www.burleighbulldogs.org/']
SQL:

assistant: SELECT COUNT("Home Ground") FROM "Table" WHERE "President" = 'Peter Williamson';