test
node1
BFO:0000040
material entity
node2
PO:0025131
plant anatomical
entity
node1->node2
node8
PO:0009011
plant structure
node2->node8
node3
BFO:0000001
entity
node4
BFO:0000002
continuant
node3->node4
node4->node4
node7
BFO:0000004
independent
continuant
node4->node7
node5
PO:0025497
collective plant
structure
node6
PO:0025269
collective organ part
structure
node5->node6
node9
PO:0000030
septum
node6->node9
node7->node7
node7->node1
node8->node5