test
node1
GO:0012501
programmed cell death
node2
GO:0006915
apoptotic process
node1->node2
node5
GO:0044346
fibroblast apoptotic
process
node2->node5
node3
BFO:0000003
occurrent
node3->node3
node4
BFO:0000015
process
node3->node4
node6
GO:0008150
biological_process
node4->node6
node7
GO:0009987
cellular process
node6->node7
node9
GO:0008219
cell death
node7->node9
node8
BFO:0000001
entity
node8->node3
node9->node1