user: Question: How many cosponsors have a Date introduced of may 22, 2008?
Columns: ['Congress', 'Bill number(s)', 'Date introduced', 'Sponsor(s)', '# of cosponsors']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['107th Congress', 'H.J.Res. 93', 'May 15, 2002', 'Ronnie Shows (D-MS)', 22.0]
SQL:

assistant: SELECT SUM("# of cosponsors") FROM "Table" WHERE "Date introduced" = 'may 22, 2008';