When Margaret Ann Bayot won binibining pilipinas-international, how many winners of Miss Universe Philippines were there?
create table table_1825751_4 (miss_universe_philippines varchar, binibining_pilipinas_international varchar, PRIMARY KEY (miss_universe_philippines))
select count(miss_universe_philippines) from table_1825751_4 where binibining_pilipinas_international = "margaret ann bayot"