test
node1
GO:0008150
biological_process
node2
GO:0032502
developmental process
node1->node2
node3
GO:0048856
anatomical structure
development
node2->node3
node4
GO:0009653
anatomical structure
morphogenesis
node2->node4
node3->node4
node5
GO:0007164
establishment of
tissue polarity
node4->node5
node6
BFO:0000015
process
node6->node1
node7
BFO:0000003
occurrent
node7->node6
node8
BFO:0000001
entity
node8->node7