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