test
node1
BFO:0000015
process
node2
GO:0008150
biological_process
node1->node2
node3
GO:0009987
cellular process
node2->node3
node5
GO:0006457
protein folding
node3->node5
node4
BFO:0000003
occurrent
node4->node1
node4->node4
node6
BFO:0000001
entity
node6->node4