nodes:
  - id: concept_A
    title: "Concept A"
  - id: concept_B
    title: "Concept B"
  - id: concept_C
    title: "Concept C"
all_type_edges:
  - start_id: concept_B
    end_id: concept_C
any_type_edges:
  - start_id: concept_A
    end_id: concept_B
  - start_id: concept_A
    end_id: concept_C

# dus A -> B, A -> C, B => C
# A -> B is dan overbodig

# flippen => levert: A -> B, A -> C, C -> B