test
node1
PO:0009005
root
node2
PO:0000042
shoot-borne root
node1->node2
node6
PO:0025593
shoot-borne internode
root
node2->node6
node3
BFO:0000001
entity
node4
BFO:0000002
continuant
node3->node4
node4->node4
node10
BFO:0000004
independent
continuant
node4->node10
node5
PO:0025025
root system
node5->node1
node7
PO:0025002
basal root
node6->node7
node8
PO:0009008
plant organ
node9
PO:0025004
plant axis
node8->node9
node9->node1
node10->node10
node13
BFO:0000040
material entity
node10->node13
node11
PO:0009011
plant structure
node12
PO:0025496
multi-tissue plant
structure
node11->node12
node16
PO:0025497
collective plant
structure
node11->node16
node12->node8
node14
PO:0025131
plant anatomical
entity
node13->node14
node14->node11
node15
PO:0025007
collective plant
organ structure
node15->node5
node16->node15