test
node1
BFO:0000015
process
node2
GO:0008150
biological_process
node1->node2
node3
GO:0008152
metabolic process
node2->node3
node5
GO:0071704
organic substance
metabolic process
node3->node5
node4
BFO:0000003
occurrent
node4->node1
node4->node4
node6
GO:1900619
acetate ester
metabolic process
node5->node6
node7
BFO:0000001
entity
node7->node4