test
node1
GO:0042221
response to chemical
node2
GO:0010035
response to inorganic
substance
node1->node2
node3
BFO:0000015
process
node4
GO:0008150
biological_process
node3->node4
node6
GO:0050896
response to stimulus
node4->node6
node5
BFO:0000003
occurrent
node5->node3
node5->node5
node6->node1
node7
BFO:0000001
entity
node7->node5