test
node1
BFO:0000003
occurrent
node1->node1
node2
BFO:0000015
process
node1->node2
node3
GO:0003674
molecular_function
node2->node3
node4
GO:0003824
catalytic activity
node3->node4
node5
GO:0032451
demethylase activity
node4->node5
node6
GO:0140096
catalytic activity,
acting on a protein
node4->node6
node8
GO:0140457
protein demethylase
activity
node5->node8
node6->node8
node7
BFO:0000001
entity
node7->node1