"Nimrod" was sold on Shackleton's return to Great Britain.

Entity and relation annotations:
id: 0
type: entity
value: text: "Nimrod"
labels: <Production>
id: 1
type: entity
value: text: Shackleton
labels: <Person>
id: 2
type: entity
value: text: Great Britain
labels: <Location>
type: relation
to_id: 2
labels: Person:visits:Location
from_id: 1