To distinguish him from other William Walkers in Spartanburg, he was nicknamed Singing Billy.

Entity and relation annotations:
id: 0
type: entity
value: text: William Walkers
labels: <Person>
id: 1
type: entity
value: text: Spartanburg
labels: <Location>
id: 2
type: entity
value: text: Singing Billy
labels: <Person>
type: relation
to_id: 2
labels: Person:coreference:Person
from_id: 0