test
node1
BFO:0000003
occurrent
node1->node1
node2
BFO:0000015
process
node1->node2
node6
GO:0008150
biological_process
node2->node6
node3
GO:0009987
cellular process
node4
GO:0061842
microtubule
organizing center
localization
node3->node4
node5
GO:0051179
localization
node5->node4
node6->node3
node6->node5
node7
BFO:0000001
entity
node7->node1