test
node1
PO:0000223
shoot axis cortex
node2
PO:0025612
stem cortex
node1->node2
node3
BFO:0000001
entity
node4
BFO:0000002
continuant
node3->node4
node4->node4
node7
BFO:0000004
independent
continuant
node4->node7
node5
PO:0009008
plant organ
node6
PO:0025004
plant axis
node5->node6
node13
PO:0025029
shoot axis
node6->node13
node7->node7
node14
BFO:0000040
material entity
node7->node14
node8
PO:0009047
stem
node8->node2
node9
PO:0009011
plant structure
node11
PO:0009007
portion of plant
tissue
node9->node11
node10
PO:0025496
multi-tissue plant
structure
node9->node10
node16
PO:0025497
collective plant
structure
node9->node16
node10->node5
node12
PO:0025059
portion of ground
tissue
node11->node12
node18
PO:0005708
cortex
node12->node18
node13->node1
node13->node8
node15
PO:0025131
plant anatomical
entity
node14->node15
node15->node9
node17
PO:0025007
collective plant
organ structure
node16->node17
node19
PO:0009006
shoot system
node17->node19
node18->node1
node19->node13