test
node1
GO:0006810
transport
node2
GO:0006811
monoatomic ion
transport
node1->node2
node5
GO:0055085
transmembrane
transport
node1->node5
node6
GO:0006820
monoatomic anion
transport
node2->node6
node10
GO:0034220
monoatomic ion
transmembrane
transport
node2->node10
node3
BFO:0000015
process
node4
GO:0008150
biological_process
node3->node4
node8
GO:0009987
cellular process
node4->node8
node12
GO:0051179
localization
node4->node12
node5->node10
node7
GO:0098656
monoatomic anion
transmembrane
transport
node6->node7
node8->node5
node9
BFO:0000003
occurrent
node9->node3
node9->node9
node10->node7
node11
BFO:0000001
entity
node11->node9
node13
GO:0051234
establishment of
localization
node12->node13
node13->node1