test
node1
GO:0001895
retina homeostasis
node2
GO:0045494
photoreceptor cell
maintenance
node1->node2
node3
GO:0001894
tissue homeostasis
node3->node1
node4
GO:0048871
multicellular
organismal-level
homeostasis
node4->node3
node5
GO:0060249
anatomical structure
homeostasis
node4->node5
node5->node3
node6
GO:0032501
multicellular
organismal process
node6->node2
node6->node4
node7
BFO:0000003
occurrent
node7->node7
node10
BFO:0000015
process
node7->node10
node8
GO:0008150
biological_process
node8->node6
node9
GO:0042592
homeostatic process
node8->node9
node9->node4
node10->node8
node11
BFO:0000001
entity
node11->node7