test
node1
BFO:0000003
occurrent
node1->node1
node2
BFO:0000015
process
node1->node2
node4
GO:0008150
biological_process
node2->node4
node3
BFO:0000001
entity
node3->node1
node5
GO:0009987
cellular process
node4->node5
node6
GO:0048870
cell motility
node5->node6
node7
GO:0016477
cell migration
node6->node7
node8
GO:0097534
lymphoid lineage cell
migration
node7->node8