Question: Who won 3rd place when the mutya ng pilipinas winner was  was rochelle romero ong?
Schema: create table table_24430894_20 (mutya_ng_pilipinas_asia_pacific varchar, PRIMARY KEY (mutya_ng_pilipinas_asia_pacific))
SQL: select 2 as nd_runner_up from table_24430894_20 where mutya_ng_pilipinas_asia_pacific = "rochelle romero ong"