test
node1
PO:0007033
whole plant
development stage
node2
PO:0028003
gametophyte
development stage
node1->node2
node7
PO:0025337
life of whole plant
stage
node1->node7
node3
PO:0009012
plant structure
development stage
node3->node1
node4
BFO:0000015
process
node4->node3
node5
BFO:0000003
occurrent
node5->node4
node5->node5
node6
BFO:0000001
entity
node6->node5
node7->node2