test
node1
BFO:0000003
occurrent
node1->node1
node2
BFO:0000015
process
node1->node2
node5
GO:0008150
biological_process
node2->node5
node3
GO:0051179
localization
node4
GO:0051640
organelle
localization
node3->node4
node7
GO:0051648
vesicle localization
node4->node7
node5->node3
node6
BFO:0000001
entity
node6->node1