test
node1
GO:0071704
organic substance
metabolic process
node2
GO:1901564
organonitrogen
compound metabolic
process
node1->node2
node3
GO:0009308
amine metabolic
process
node2->node3
node4
GO:0008152
metabolic process
node4->node1
node5
GO:0006807
nitrogen compound
metabolic process
node4->node5
node5->node2
node6
BFO:0000003
occurrent
node6->node6
node7
BFO:0000015
process
node6->node7
node8
GO:0008150
biological_process
node7->node8
node8->node4
node9
BFO:0000001
entity
node9->node6