test
node1
BFO:0000015
process
node2
GO:0008150
biological_process
node1->node2
node3
GO:0050896
response to stimulus
node2->node3
node4
GO:0009605
response to external
stimulus
node3->node4
node5
GO:0009991
response to
extracellular
stimulus
node4->node5
node6
GO:0031667
response to nutrient
levels
node5->node6
node9
GO:0019740
nitrogen utilization
node6->node9
node7
BFO:0000003
occurrent
node7->node1
node7->node7
node8
BFO:0000001
entity
node8->node7