test
node1
GO:0009605
response to external
stimulus
node2
GO:0043476
pigment accumulation
node1->node2
node10
GO:0043482
cellular pigment
accumulation
node2->node10
node3
GO:0009987
cellular process
node5
GO:0033059
cellular pigmentation
node3->node5
node4
GO:0051716
cellular response to
stimulus
node3->node4
node4->node10
node5->node10
node6
BFO:0000003
occurrent
node6->node6
node8
BFO:0000015
process
node6->node8
node7
GO:0050896
response to stimulus
node7->node1
node7->node4
node9
GO:0008150
biological_process
node8->node9
node9->node3
node11
GO:0043473
pigmentation
node9->node11
node9->node7
node11->node5
node11->node2
node12
BFO:0000001
entity
node12->node6