Ball served his country during the Second Boer War.

Entity and relation annotations:
id: 0
type: entity
value: text: Ball
labels: <Person>
id: 1
type: entity
value: text: during the Second Boer War
labels: <Date>
id: 2
type: entity
value: text: the Second Boer War
labels: <Event>
type: relation
to_id: 2
labels: Person:participates_in:Event
from_id: 0