test
node1
BFO:0000001
entity
node2
BFO:0000003
occurrent
node1->node2
node2->node2
node9
BFO:0000015
process
node2->node9
node3
GO:0051716
cellular response to
stimulus
node4
GO:0070887
cellular response to
chemical stimulus
node3->node4
node5
GO:0009987
cellular process
node5->node3
node6
GO:0042221
response to chemical
node6->node4
node7
GO:0008150
biological_process
node7->node5
node8
GO:0050896
response to stimulus
node7->node8
node8->node3
node8->node6
node9->node7