test
node1
GO:0008152
metabolic process
node2
GO:0044238
primary metabolic
process
node1->node2
node5
GO:0071704
organic substance
metabolic process
node1->node5
node3
GO:0005975
carbohydrate
metabolic process
node2->node3
node4
GO:0009311
oligosaccharide
metabolic process
node3->node4
node5->node3
node6
BFO:0000003
occurrent
node6->node6
node7
BFO:0000015
process
node6->node7
node8
GO:0008150
biological_process
node7->node8
node8->node1
node9
BFO:0000001
entity
node9->node6