test
node1
GO:0007600
sensory perception
node2
GO:0050954
sensory perception of
mechanical stimulus
node1->node2
node3
BFO:0000003
occurrent
node3->node3
node5
BFO:0000015
process
node3->node5
node4
GO:0050877
nervous system
process
node4->node1
node6
GO:0008150
biological_process
node5->node6
node7
GO:0032501
multicellular
organismal process
node6->node7
node9
GO:0003008
system process
node7->node9
node8
BFO:0000001
entity
node8->node3
node9->node4