test
node1
GO:0055080
monoatomic cation
homeostasis
node2
GO:0055070
copper ion
homeostasis
node1->node2
node3
GO:0048878
chemical homeostasis
node4
GO:0098771
inorganic ion
homeostasis
node3->node4
node9
GO:0050801
monoatomic ion
homeostasis
node3->node9
node4->node2
node5
BFO:0000015
process
node6
GO:0008150
biological_process
node5->node6
node10
GO:0042592
homeostatic process
node6->node10
node7
BFO:0000001
entity
node8
BFO:0000003
occurrent
node7->node8
node8->node5
node8->node8
node9->node1
node10->node3