test
node1
GO:0008150
biological_process
node2
GO:0050896
response to stimulus
node1->node2
node3
GO:0042221
response to chemical
node2->node3
node4
GO:0010033
response to organic
substance
node3->node4
node7
GO:0034097
response to cytokine
node4->node7
node5
BFO:0000003
occurrent
node5->node5
node6
BFO:0000015
process
node5->node6
node6->node1
node8
GO:0070741
response to
interleukin-6
node7->node8
node9
BFO:0000001
entity
node9->node5