test
node1
BFO:0000015
process
node2
GO:0008150
biological_process
node1->node2
node8
GO:0032502
developmental process
node2->node8
node3
GO:0048513
animal organ
development
node4
GO:0001890
placenta development
node3->node4
node5
BFO:0000001
entity
node6
BFO:0000003
occurrent
node5->node6
node6->node1
node6->node6
node7
GO:0048856
anatomical structure
development
node7->node3
node8->node7