test
node1
BFO:0000003
occurrent
node1->node1
node2
BFO:0000015
process
node1->node2
node3
GO:0008150
biological_process
node2->node3
node5
GO:0050896
response to stimulus
node3->node5
node7
GO:0002376
immune system process
node3->node7
node4
BFO:0000001
entity
node4->node1
node6
GO:0006955
immune response
node5->node6
node8
GO:0006959
humoral immune
response
node6->node8
node7->node6