user: Question: What is the sum of # Of Candidates, when # of Constituency Votes is less than 25643309, when Leader is masayoshi ōhira, and when Election is before 1979?
Columns: ['Election', 'Leader', '# of candidates', '# of Constituency votes', '% of Constituency vote']
Types: ['real', 'text', 'real', 'real', 'text']
Sample row: [1958.0, 'Nobusuke Kishi', 413.0, 23840170.0, '59.0%']
SQL:

assistant: SELECT SUM("# of candidates") FROM "Table" WHERE "# of Constituency votes" < 25643309.0 AND "Leader" = 'masayoshi ōhira' AND "Election" < 1979.0;