ทีมเหย้าทีมไหนมีจีลองเป็นทีมเยือน?ไม่จำเป็นต้องใช้ทุกโต๊ะ
Which home teams had Geelong as the away team?It is not neccessary to use all the tables.
 table_name_19:  (home_team [ VARCHAR ] away_team [ VARCHAR) ]
SELECT home_team FROM table_name_19 WHERE away_team = "geelong"