test
node1
GO:0050896
response to stimulus
node2
GO:0042221
response to chemical
node1->node2
node7
GO:0010033
response to organic
substance
node2->node7
node9
GO:1901698
response to nitrogen
compound
node2->node9
node3
BFO:0000015
process
node4
GO:0008150
biological_process
node3->node4
node4->node1
node5
BFO:0000001
entity
node6
BFO:0000003
occurrent
node5->node6
node6->node3
node6->node6
node8
GO:0010243
response to
organonitrogen
compound
node7->node8
node9->node8