Around 1548 St. Francis Xavier began his mission among the pearl fishermen of Goa, before he set sail for Japan.
St Francis exavier learned a lot from the pearl fishermen of goa. 
mnli hypothesis: St Francis exavier learned a lot from the pearl fishermen of goa.  premise: Around 1548 St. Francis Xavier began his mission among the pearl fishermen of Goa, before he set sail for Japan.