t1: id: 1 member_role: "some" member_type: "way" member_id: 3 t2: id: 1 member_role: "some" member_type: "node" member_id: 5 t3: id: 1 member_role: "some" member_type: "relation" member_id: 3 t4: id: 3 member_role: "some" member_type: "node" member_id: 5