test
node1
BFO:0000040
material entity
node2
PO:0025131
plant anatomical
entity
node1->node2
node7
PO:0009011
plant structure
node2->node7
node3
PO:0009007
portion of plant
tissue
node4
PO:0005679
plant epidermis
node3->node4
node8
PO:0000282
trichome
node4->node8
node5
BFO:0000001
entity
node6
BFO:0000002
continuant
node5->node6
node6->node6
node9
BFO:0000004
independent
continuant
node6->node9
node7->node8
node7->node3
node9->node9
node9->node1