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