Table: youth_dev_games
Columns: round
opponent
date
venue
competition

Question: who was the opponent with round 17?
SQL: SELECT "opponent" FROM youth_dev_games WHERE "round" = '17'

Question: what round saw wakefield trinity wildcats u21 as the opponenet at belle vue?
SQL: SELECT "round" FROM youth_dev_games WHERE "opponent" = 'wakefield trinity wildcats u21' AND "venue" = 'belle vue'

Question: what round happened at galpharm stadium?
SQL: SELECT "round" FROM youth_dev_games WHERE "venue" = 'galpharm stadium'