test
node1
PO:0025571
multi-tissue plant
structure development
stage
node2
PO:0025339
plant organ
development stage
node1->node2
node3
PO:0007520
root development
stage
node2->node3
node4
PO:0001031
4 root elongation
stage
node3->node4
node5
BFO:0000015
process
node6
PO:0009012
plant structure
development stage
node5->node6
node6->node1
node7
BFO:0000003
occurrent
node7->node7
node7->node5
node8
BFO:0000001
entity
node8->node7