test
node1
BFO:0000001
entity
node2
BFO:0000003
occurrent
node1->node2
node2->node2
node5
BFO:0000015
process
node2->node5
node3
GO:0008150
biological_process
node4
GO:0051179
localization
node3->node4
node6
GO:0009987
cellular process
node3->node6
node7
GO:0051641
cellular localization
node4->node7
node9
GO:0051235
maintenance of
location
node4->node9
node5->node3
node6->node7
node8
GO:0051651
maintenance of
location in cell
node6->node8
node7->node8
node9->node8