test
node1
GO:0050896
response to stimulus
node2
GO:0042221
response to chemical
node1->node2
node3
GO:1901698
response to nitrogen
compound
node2->node3
node8
GO:0072737
response to diamide
node3->node8
node4
BFO:0000015
process
node5
GO:0008150
biological_process
node4->node5
node5->node1
node6
BFO:0000003
occurrent
node6->node4
node6->node6
node7
BFO:0000001
entity
node7->node6