test
node1
GO:0008150
biological_process
node2
GO:0050896
response to stimulus
node1->node2
node6
GO:0042221
response to chemical
node2->node6
node3
GO:0034097
response to cytokine
node4
GO:0098756
response to
interleukin-21
node3->node4
node5
BFO:0000015
process
node5->node1
node7
GO:0010033
response to organic
substance
node6->node7
node7->node3
node8
BFO:0000003
occurrent
node8->node5
node8->node8
node9
BFO:0000001
entity
node9->node8