Table schema:
CREATE TABLE table_1825751_4 (miss_universe_philippines VARCHAR, binibining_pilipinas_international VARCHAR)

Question: When Margaret Ann Bayot won binibining pilipinas-international, how many winners of Miss Universe Philippines were there?
SQL: SELECT COUNT(miss_universe_philippines) FROM table_1825751_4 WHERE binibining_pilipinas_international = "Margaret Ann Bayot"