test
node1
BFO:0000040
material entity
node2
PO:0025131
plant anatomical
entity
node1->node2
node9
PO:0009011
plant structure
node2->node9
node3
BFO:0000001
entity
node4
BFO:0000002
continuant
node3->node4
node4->node4
node7
BFO:0000004
independent
continuant
node4->node7
node5
PO:0025606
native plant cell
node6
PO:0030059
tmema cell
node5->node6
node7->node7
node7->node1
node8
PO:0009002
plant cell
node8->node5
node9->node8