test
node1
GO:0006810
transport
node2
GO:0055085
transmembrane
transport
node1->node2
node8
GO:0071705
nitrogen compound
transport
node1->node8
node10
GO:0071702
organic substance
transport
node1->node10
node7
GO:0071918
urea transmembrane
transport
node2->node7
node3
GO:0019755
one-carbon compound
transport
node4
GO:0015840
urea transport
node3->node4
node4->node7
node5
BFO:0000003
occurrent
node5->node5
node6
BFO:0000015
process
node5->node6
node12
GO:0008150
biological_process
node6->node12
node9
GO:0042886
amide transport
node8->node9
node9->node4
node10->node3
node11
BFO:0000001
entity
node11->node5
node13
GO:0051179
localization
node12->node13
node14
GO:0009987
cellular process
node12->node14
node15
GO:0051234
establishment of
localization
node13->node15
node14->node2
node15->node1