Three islands, Marmaris, Klisova and Aitoliko controlled the entrance to the lagoon.

Entity and relation annotations:
id: 0
type: entity
value: text: Three islands
labels: <Location>
id: 1
type: entity
value: text: Marmaris
labels: <Location>
id: 2
type: entity
value: text: Klisova
labels: <Location>
id: 3
type: entity
value: text: Aitoliko
labels: <Location>
type: relation
to_id: 1
labels: Location:Adjacent:Location
from_id: 0
type: relation
to_id: 2
labels: Location:Adjacent:Location
from_id: 1
type: relation
to_id: 3
labels: Location:Adjacent:Location
from_id: 2
type: relation
to_id: 2
labels: Location:Adjacent:Location
from_id: 0
type: relation
to_id: 3
labels: Location:Adjacent:Location
from_id: 0
type: relation
to_id: 3
labels: Location:Adjacent:Location
from_id: 1