what round saw wakefield trinity wildcats u21 as the opponenet at belle vue?
CREATE TABLE table_name_19 (round VARCHAR, opponent VARCHAR, venue VARCHAR)
SELECT round FROM table_name_19 WHERE opponent = "wakefield trinity wildcats u21" AND venue = "belle vue"
### Context: CREATE TABLE table_name_19 (round VARCHAR, opponent VARCHAR, venue VARCHAR) ### Question: what round saw wakefield trinity wildcats u21 as the opponenet at belle vue? ### Answer: SELECT round FROM table_name_19 WHERE opponent = "wakefield trinity wildcats u21" AND venue = "belle vue"