user: Question: When Denizli was the province, what was the total number of valid votes?
Columns: ['Province', 'Registered voters', 'People voted', 'Valid votes', 'Invalid votes', 'Yes', 'Yes (%)', 'No', 'No (%)', 'Turnout (%)']
Types: ['text', 'real', 'real', 'real', 'real', 'real', 'text', 'real', 'text', 'text']
Sample row: ['Adana', 1386290.0, 1009435.0, 992202.0, 17233.0, 434066.0, '43.75', 558136.0, '56.25', '72.82']
SQL:

assistant: SELECT SUM("Valid votes") FROM "Table" WHERE "Province" = 'Denizli';