test
node1
GO:0008152
metabolic process
node2
GO:0019748
secondary metabolic
process
node1->node2
node7
GO:0009237
siderophore metabolic
process
node2->node7
node3
BFO:0000001
entity
node4
BFO:0000003
occurrent
node3->node4
node4->node4
node6
BFO:0000015
process
node4->node6
node5
GO:0008150
biological_process
node5->node1
node6->node5