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_name_19 ( opponent_number VARCHAR, attendance VARCHAR )

### Question ###
Who was the opponent in the game that was attended by 42,000 people?

### Accurate SQL ###

SELECT opponent_number FROM table_name_19 WHERE attendance = "42,000"