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