Clutch then signed with major label Columbia for 1998 's " The Elephant Riders , " but released 1999 's " Jam Room " on their own River Road Records label .
Head entity: jam room Q3160765 21 22
Tail entity: the elephant riders Q3520731 11 12 13
Relation (head \u2192 tail): P156
Inverse relation (tail \u2192 head): P155