test
node1
GO:0044848
biological phase
node2
GO:0022403
cell cycle phase
node1->node2
node3
BFO:0000003
occurrent
node3->node3
node4
BFO:0000015
process
node3->node4
node5
GO:0008150
biological_process
node4->node5
node5->node1
node6
BFO:0000001
entity
node6->node3