test
node1
GO:0009416
response to light
stimulus
node2
GO:0009648
photoperiodism
node1->node2
node3
GO:0050896
response to stimulus
node4
GO:0009628
response to abiotic
stimulus
node3->node4
node6
GO:0009314
response to radiation
node4->node6
node5
GO:0008150
biological_process
node5->node3
node6->node1
node7
BFO:0000003
occurrent
node7->node7
node8
BFO:0000015
process
node7->node8
node8->node5
node9
BFO:0000001
entity
node9->node7