Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_75312 ( "Season" text, "Season Premiere" text, "Season Finale" text, "Winner" text, "Runner-up" text, "Number of Contestants" real, "Winner's Country" text, "Runner Up's Country" text )

### Question ###
What season's premiere had puerto rico winning on May 20, 2012?

### Accurate SQL ###

SELECT "Season Premiere" FROM table_75312 WHERE "Winner's Country" = 'puerto rico' AND "Season Finale" = 'may 20, 2012'