Table: rugby_league_premiers_2
Columns: season
grand_finaldate
winningteam
score
losingteam
location
gf_attendance
clive_churchill_medal

Question: Who wins the clive churchill medal when the losing team is the sydney roosters in 2010?
SQL: SELECT "clive_churchill_medal" FROM rugby_league_premiers_2 WHERE "losingteam" = 'sydney roosters' AND "season" = 2010

Question: What is the grand final date for the game with a score or 30-24?
SQL: SELECT "grand_finaldate" FROM rugby_league_premiers_2 WHERE "score" = '30-24'