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_81 (away_captain VARCHAR, venue VARCHAR)

### Question ###
Who was the away captain for matches played at Trent Bridge?

### Accurate SQL ###

SELECT away_captain FROM table_name_81 WHERE venue = "trent bridge"