test
node1
GO:0008152
metabolic process
node2
GO:0044237
cellular metabolic
process
node1->node2
node3
GO:0043094
cellular metabolic
compound salvage
node2->node3
node4
BFO:0000003
occurrent
node4->node4
node7
BFO:0000015
process
node4->node7
node5
GO:0009987
cellular process
node5->node2
node6
GO:0008150
biological_process
node6->node1
node6->node5
node7->node6
node8
BFO:0000001
entity
node8->node4