user: Question: How many groups of candidates are there in there in the district where the incumbent is Doc Hastings?
Columns: ['District', 'Incumbent', 'Party', 'Elected', 'Status', '2008 Candidates', 'Results']
Types: ['text', 'text', 'text', 'real', 'text', 'text', 'text']
Sample row: ['Washington 1', 'Jay Inslee', 'Democrat', 1998.0, 'Running', 'Jay Inslee (D) (cw) Larry Ishmael (R) (cw)', '68% 32%']
SQL:

assistant: SELECT COUNT("2008 Candidates") FROM "Table" WHERE "Incumbent" = 'Doc Hastings';