test
node1
GO:0008150
biological_process
node2
GO:0032501
multicellular
organismal process
node1->node2
node6
GO:0003008
system process
node2->node6
node3
BFO:0000003
occurrent
node3->node3
node4
BFO:0000015
process
node3->node4
node4->node1
node5
BFO:0000001
entity
node5->node3
node7
GO:0003014
renal system process
node6->node7
node8
GO:0070293
renal absorption
node7->node8
node9
GO:1990297
renal amino acid
absorption
node8->node9