test
node1
BFO:0000004
independent
continuant
node1->node1
node2
BFO:0000040
material entity
node1->node2
node3
PO:0025131
plant anatomical
entity
node2->node3
node6
PO:0009011
plant structure
node3->node6
node4
BFO:0000001
entity
node5
BFO:0000002
continuant
node4->node5
node5->node1
node5->node5
node7
PO:0025496
multi-tissue plant
structure
node6->node7
node8
PO:0009008
plant organ
node7->node8