During the Korean War, Johnson served as a naval officer in Japan.

Entity and relation annotations:
id: 0
type: entity
value: text: During the Korean War
labels: <Date>
id: 1
type: entity
value: text: the Korean War
labels: <Event>
id: 2
type: entity
value: text: Johnson
labels: <Person>
id: 3
type: entity
value: text: Japan
labels: <Location>
id: 4
type: entity
value: text: naval officer
labels: <Title>
type: relation
to_id: 1
labels: Person:participates_in:Event
from_id: 2
type: relation
to_id: 3
labels: Person:works_at:Location
from_id: 2
type: relation
to_id: 4
labels: Person:holds_title:Title
from_id: 2