sources:
  ls_persons: ['data.csv~csv']

targets:
  person_target:
    source: ls_persons
    type: void
    access: $(goesto).ttl
    serialization: turtle

mappings:
  persons:
    sources: ls_persons
    subjects:
      - value: http://example.org/$(number)
    po:
      - p:
        - value: foaf:age
          targets: person_target
        o: $(number)