test
node1
BFO:0000004
independent
continuant
node1->node1
node2
BFO:0000040
material entity
node1->node2
node5
PO:0025131
plant anatomical
entity
node2->node5
node3
PO:0009011
plant structure
node4
PO:0000003
whole plant
node3->node4
node7
PO:0009009
plant embryo
node4->node7
node5->node3
node6
BFO:0000002
continuant
node6->node1
node6->node6
node8
BFO:0000001
entity
node8->node6