test
node1
BFO:0000015
process
node2
GO:0008150
biological_process
node1->node2
node6
GO:0051179
localization
node2->node6
node3
BFO:0000003
occurrent
node3->node1
node3->node3
node4
GO:0006811
monoatomic ion
transport
node5
GO:0006812
monoatomic cation
transport
node4->node5
node9
GO:0030001
metal ion transport
node5->node9
node7
GO:0051234
establishment of
localization
node6->node7
node8
GO:0006810
transport
node7->node8
node8->node4
node11
GO:0000041
transition metal ion
transport
node9->node11
node10
BFO:0000001
entity
node10->node3
node12
GO:0006826
iron ion transport
node11->node12