Assertion: folk music's drum | /r/HasProperty | struck by the hand
Facets:
value: on a ball-headed beater
type: TRANSITIVE-OBJECT
value: on the left head
type: LOCATION
Source sentences:
text: A drum sound itself is produced in Korea by the most popular percussion instrument, the changgo, an hourglass-shaped, two-headed drum struck by the hand on the left head and a stick or a ball-headed beater on the other.