test
node1
GO:0048513
animal organ
development
node2
GO:0043588
skin development
node1->node2
node3
GO:0008150
biological_process
node4
GO:0032502
developmental process
node3->node4
node6
GO:0048856
anatomical structure
development
node4->node6
node5
BFO:0000003
occurrent
node5->node5
node7
BFO:0000015
process
node5->node7
node6->node1
node7->node3
node8
BFO:0000001
entity
node8->node5