test
node1
GO:0008150
biological_process
node2
GO:0032501
multicellular
organismal process
node1->node2
node3
GO:0003008
system process
node2->node3
node4
GO:0050877
nervous system
process
node3->node4
node8
GO:0007600
sensory perception
node4->node8
node5
BFO:0000003
occurrent
node5->node5
node6
BFO:0000015
process
node5->node6
node6->node1
node7
BFO:0000001
entity
node7->node5