test
node1
GO:0009987
cellular process
node2
GO:0097194
execution phase of
apoptosis
node1->node2
node3
GO:0008219
cell death
node1->node3
node4
GO:0012501
programmed cell death
node3->node4
node7
GO:0006915
apoptotic process
node4->node7
node5
BFO:0000001
entity
node6
BFO:0000003
occurrent
node5->node6
node6->node6
node8
BFO:0000015
process
node6->node8
node7->node2
node9
GO:0008150
biological_process
node8->node9
node9->node1