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_19986 ( "Round" real, "Date" text, "Grand Prix" text, "Circuit" text, "125cc winner" text, "250cc winner" text, "MotoGP winner" text, "Report" text )

### Question ###
Who won the spanish grand prix?

### Accurate SQL ###

SELECT "250cc winner" FROM table_19986 WHERE "Grand Prix" = 'Spanish Grand Prix'