source_results = [
          result(id: 1, event_id: 1, race_id: 1, participant_id: 1, place: "1"),
          result(id: 2, event_id: 2, race_id: 2, participant_id: 1, place: "6"),
          result(id: 3, event_id: 2, race_id: 2, participant_id: 2, place: "2"),
          result(id: 4, event_id: 2, race_id: 3, participant_id: 3, place: "13"),