test
node1
BFO:0000002
continuant
node1->node1
node2
BFO:0000020
specifically
dependent continuant
node1->node2
node2->node2
node3
PATO:0000001
quality
node2->node3
node4
PATO:0001236
process quality
node3->node4
node6
TO:0000283
biological process
trait
node4->node6
node5
BFO:0000001
entity
node5->node1
node7
TO:0000387
plant trait
node7->node6