test
node1
GO:0010033
response to organic
substance
node2
GO:0009725
response to hormone
node1->node2
node3
BFO:0000003
occurrent
node3->node3
node4
BFO:0000015
process
node3->node4
node5
GO:0008150
biological_process
node4->node5
node6
GO:0050896
response to stimulus
node5->node6
node7
GO:0009719
response to
endogenous stimulus
node6->node7
node8
GO:0042221
response to chemical
node6->node8
node7->node2
node8->node1
node9
BFO:0000001
entity
node9->node3