The result was the Lanchester submachine gun, which saw service with the Royal Navy.

Entity and relation annotations:
id: 0
type: entity
value: text: Lanchester submachine gun
labels: <Production>
id: 1
type: entity
value: text: the Royal Navy
labels: <Organization>
type: relation
to_id: 0
labels: Organization:manages/uses:Production
from_id: 1