test
node1
BFO:0000015
process
node2
GO:0008150
biological_process
node1->node2
node3
GO:0009987
cellular process
node2->node3
node4
GO:0048870
cell motility
node3->node4
node6
GO:0016477
cell migration
node4->node6
node5
BFO:0000003
occurrent
node5->node1
node5->node5
node8
GO:0014812
muscle cell migration
node6->node8
node7
BFO:0000001
entity
node7->node5