test
node1
GO:0071704
organic substance
metabolic process
node2
GO:0043170
macromolecule
metabolic process
node1->node2
node4
GO:0010467
gene expression
node2->node4
node3
BFO:0000003
occurrent
node3->node3
node5
BFO:0000015
process
node3->node5
node6
GO:0008150
biological_process
node5->node6
node7
GO:0008152
metabolic process
node6->node7
node7->node1
node8
BFO:0000001
entity
node8->node3