test
node1
GO:1901698
response to nitrogen
compound
node2
GO:0080033
response to nitrite
node1->node2
node3
BFO:0000015
process
node4
GO:0008150
biological_process
node3->node4
node5
GO:0050896
response to stimulus
node4->node5
node6
GO:0042221
response to chemical
node5->node6
node6->node1
node7
GO:0010035
response to inorganic
substance
node6->node7
node9
GO:1901700
response to
oxygen-containing
compound
node6->node9
node7->node2
node8
BFO:0000003
occurrent
node8->node3
node8->node8
node9->node2
node10
BFO:0000001
entity
node10->node8