While Tombstone was under anesthesia, Kangaroo could attack him by crawling through the ductwork.

Entity and relation annotations:
id: 0
type: entity
value: text: Tombstone
labels: <Person>
id: 1
type: entity
value: text: Kangaroo
labels: <Person>
type: relation
to_id: 0
labels: Person:harms:Person
from_id: 1