test
node1
BFO:0000003
occurrent
node1->node1
node6
BFO:0000015
process
node1->node6
node2
GO:0008152
metabolic process
node3
GO:0071704
organic substance
metabolic process
node2->node3
node5
GO:1900558
austinol metabolic
process
node3->node5
node4
GO:0008150
biological_process
node4->node2
node6->node4
node7
BFO:0000001
entity
node7->node1