test
node1
BFO:0000003
occurrent
node1->node1
node2
BFO:0000015
process
node1->node2
node4
GO:0003674
molecular_function
node2->node4
node3
BFO:0000001
entity
node3->node1
node5
GO:0005488
binding
node4->node5
node6
GO:0033218
amide binding
node5->node6