test
node1
GO:0006915
apoptotic process
node2
GO:0010657
muscle cell apoptotic
process
node1->node2
node3
BFO:0000003
occurrent
node3->node3
node4
BFO:0000015
process
node3->node4
node5
GO:0008150
biological_process
node4->node5
node6
GO:0009987
cellular process
node5->node6
node8
GO:0008219
cell death
node6->node8
node7
BFO:0000001
entity
node7->node3
node9
GO:0012501
programmed cell death
node8->node9
node9->node1