test
node1
BFO:0000001
entity
node2
BFO:0000003
occurrent
node1->node2
node2->node2
node3
BFO:0000015
process
node2->node3
node4
GO:0008150
biological_process
node3->node4
node5
GO:0050896
response to stimulus
node4->node5
node8
GO:0042221
response to chemical
node5->node8
node6
GO:0010033
response to organic
substance
node7
GO:0014070
response to organic
cyclic compound
node6->node7
node9
GO:1901424
response to toluene
node7->node9
node8->node6