test
node1
BFO:0000003
occurrent
node1->node1
node2
BFO:0000015
process
node1->node2
node3
GO:0008150
biological_process
node2->node3
node4
GO:0032502
developmental process
node3->node4
node6
GO:0032501
multicellular
organismal process
node3->node6
node7
GO:0048856
anatomical structure
development
node4->node7
node5
BFO:0000001
entity
node5->node1
node8
GO:0007275
multicellular
organism development
node6->node8
node7->node8
node9
GO:0035295
tube development
node7->node9
node8->node9