Tula was strategically important to the Soviet Union during the Cold War.

Entity and relation annotations:
id: 0
type: entity
value: text: during the Cold War
labels: <Date>
id: 1
type: entity
value: text: the Cold War
labels: <Event>
id: 2
type: entity
value: text: Tula
labels: <Location>
id: 3
type: entity
value: text: the Soviet Union
labels: <Location>