test
node1
BFO:0000003
occurrent
node1->node1
node4
BFO:0000015
process
node1->node4
node2
GO:0032501
multicellular
organismal process
node3
GO:0050879
multicellular
organismal movement
node2->node3
node5
GO:0008150
biological_process
node4->node5
node5->node2
node6
BFO:0000001
entity
node6->node1