human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Club, Played, Drawn, Lost, Points for, Points against, Tries for, Tries against, Try bonus, Losing bonus, Points
###Question: what is the points against when the losing bonus is 0 and the club is banwen rfc?
gpt
SELECT Points against FROM table WHERE Losing bonus = 0 AND Club = banwen rfc