test
node1
BFO:0000003
occurrent
node1->node1
node7
BFO:0000015
process
node1->node7
node2
GO:0009987
cellular process
node3
GO:0044237
cellular metabolic
process
node2->node3
node6
GO:0010191
mucilage metabolic
process
node3->node6
node4
GO:0008150
biological_process
node4->node2
node5
GO:0008152
metabolic process
node4->node5
node5->node3
node7->node4
node8
BFO:0000001
entity
node8->node1