test
node1
BFO:0000003
occurrent
node1->node1
node2
BFO:0000015
process
node1->node2
node7
GO:0008150
biological_process
node2->node7
node3
GO:0042221
response to chemical
node4
GO:0010033
response to organic
substance
node3->node4
node5
GO:1901700
response to
oxygen-containing
compound
node3->node5
node6
GO:0045472
response to ether
node4->node6
node5->node6
node8
GO:0050896
response to stimulus
node7->node8
node8->node3
node9
BFO:0000001
entity
node9->node1