t1:
  relation_id: 1
  sequence_id: 1
  member_role: "some"
  member_type: "Way"
  member_id: 3

t2:
  relation_id: 1
  sequence_id: 2
  member_role: "some"
  member_type: "Node"
  member_id: 5

t3:
  relation_id: 1
  sequence_id: 3
  member_role: "some"
  member_type: "Relation"
  member_id: 3

t4:
  relation_id: 3
  sequence_id: 1
  member_role: "some"
  member_type: "Node"
  member_id: 5

t5:
  relation_id: 2
  sequence_id: 1
  member_role: "some"
  member_type: "Node"
  member_id: 5
  
public_used:
  relation_id: 6
  member_role: "used by other relation"
  member_type: "Relation"
  member_id: 5

r8_m1:
  relation_id: 8
  sequence_id: 1
  member_role: "some node"
  member_type: "Node"
  member_id: 15

r8_m2:
  relation_id: 8
  sequence_id: 2
  member_role: "some way"
  member_type: "Way"
  member_id: 4

r8_m3:
  relation_id: 8
  sequence_id: 3
  member_role: "some relation"
  member_type: "Relation"
  member_id: 7
