test
node1
BFO:0000003
occurrent
node1->node1
node6
BFO:0000015
process
node1->node6
node2
GO:0006810
transport
node3
GO:0072348
sulfur compound
transport
node2->node3
node4
GO:0008150
biological_process
node5
GO:0051179
localization
node4->node5
node7
GO:0051234
establishment of
localization
node5->node7
node6->node4
node7->node2
node8
BFO:0000001
entity
node8->node1