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