test
node1
GO:0009987
cellular process
node2
GO:0022402
cell cycle process
node1->node2
node3
GO:0007049
cell cycle
node1->node3
node3->node2
node4
GO:0008150
biological_process
node4->node1
node5
BFO:0000001
entity
node6
BFO:0000003
occurrent
node5->node6
node6->node6
node7
BFO:0000015
process
node6->node7
node7->node4