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_21256068_3 ( opponent VARCHAR, venue VARCHAR, competition VARCHAR )

### Question ###
state the opponent on halliwell jones stadium in super league xiv

### Accurate SQL ###

SELECT opponent FROM table_21256068_3 WHERE venue = "Halliwell Jones Stadium" AND competition = "Super League XIV"