test
node1
BFO:0000003
occurrent
node1->node1
node4
BFO:0000015
process
node1->node4
node2
GO:0003674
molecular_function
node3
GO:0003824
catalytic activity
node2->node3
node6
GO:0016491
oxidoreductase
activity
node3->node6
node4->node2
node5
BFO:0000001
entity
node5->node1
node7
GO:0016627
oxidoreductase
activity, acting on
the CH-CH group of
donors
node6->node7
node8
GO:0000104
succinate
dehydrogenase
activity
node7->node8