Dahlbergh contacted the publishing firm of Merian and provided topographical maps.

Entity and relation annotations:
id: 0
type: entity
value: text: Dahlbergh 
labels: <Person>
id: 1
type: entity
value: text: the publishing firm of Merian
labels: <Organization>
type: relation
to_id: 1
labels: Person:provides_services_to:Organization
from_id: 0