test
node1
GO:0008152
metabolic process
node2
GO:0044237
cellular metabolic
process
node1->node2
node4
GO:0072592
oxygen metabolic
process
node2->node4
node3
BFO:0000003
occurrent
node3->node3
node7
BFO:0000015
process
node3->node7
node5
GO:0009987
cellular process
node5->node2
node6
GO:0008150
biological_process
node6->node1
node6->node5
node7->node6
node8
BFO:0000001
entity
node8->node3