test
node1
GO:0050896
response to stimulus
node4
GO:0009605
response to external
stimulus
node1->node4
node2
GO:0009607
response to biotic
stimulus
node1->node2
node5
GO:0043207
response to external
biotic stimulus
node2->node5
node3
GO:0008150
biological_process
node3->node1
node4->node5
node6
BFO:0000003
occurrent
node6->node6
node7
BFO:0000015
process
node6->node7
node7->node3
node8
BFO:0000001
entity
node8->node6