Once in Richmond, Alexander took command of the Castle Thunder Prison.

Entity and relation annotations:
id: 0
type: entity
value: text: Richmond
labels: <Location>
id: 1
type: entity
value: text: Alexander
labels: <Person>
id: 2
type: entity
value: text: the Castle Thunder Prison
labels: <Organization>
type: relation
to_id: 0
labels: Person:visits:Location
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type: relation
to_id: 2
labels: Person:affiliated_with:Organization
from_id: 1