test
node1
BFO:0000003
occurrent
node1->node1
node2
BFO:0000015
process
node1->node2
node5
GO:0008150
biological_process
node2->node5
node3
GO:0006790
sulfur compound
metabolic process
node4
GO:0044273
sulfur compound
catabolic process
node3->node4
node6
GO:0009987
cellular process
node5->node6
node7
GO:0008152
metabolic process
node5->node7
node8
GO:0044237
cellular metabolic
process
node6->node8
node7->node8
node9
GO:0009056
catabolic process
node7->node9
node8->node3
node10
GO:0044248
cellular catabolic
process
node8->node10
node9->node10
node10->node4
node11
BFO:0000001
entity
node11->node1