user: Question: How many First Pref votes have Seats of 1?
Columns: ['Party', 'Seats', '% of seats', 'First Pref votes', '% FPv']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['Sinn Féin (Pro-Treaty)', '58', '45.3', 239195.0, '38.5']
SQL:

assistant: SELECT SUM("First Pref votes") FROM "Table" WHERE "Seats" = '1';