The Russians retained Trans-Baikalia between Lake Baikal and the Argun River north of Mongolia.

Entity and relation annotations:
id: 0
type: entity
value: text: Lake Baikal
labels: <Location>
id: 1
type: entity
value: text: the Argun River
labels: <Location>
id: 2
type: entity
value: text: Mongolia
labels: <Location>
id: 3
type: entity
value: text: The Russians 
labels: <Organization>
id: 4
type: entity
value: text: Trans-Baikalia
labels: <Location>
type: relation
to_id: 2
labels: Location:located_in:Location
from_id: 1
type: relation
to_id: 0
labels: Location:Adjacent:Location
from_id: 4
type: relation
to_id: 1
labels: Location:Adjacent:Location
from_id: 4