test
node1
BFO:0000003
occurrent
node1->node1
node2
BFO:0000015
process
node1->node2
node5
GO:0003674
molecular_function
node2->node5
node3
GO:0016741
transferase activity,
transferring
one-carbon groups
node4
GO:0008168
methyltransferase
activity
node3->node4
node6
GO:0003824
catalytic activity
node5->node6
node7
GO:0016740
transferase activity
node6->node7
node7->node3
node8
BFO:0000001
entity
node8->node1