test
node1
TO:0000277
biochemical trait
node2
TO:0000465
mineral and ion
content trait
node1->node2
node3
TO:0000609
potassium content
node2->node3
node8
TO:0020003
shoot system
potassium content
node3->node8
node4
BFO:0000001
entity
node5
BFO:0000002
continuant
node4->node5
node5->node5
node6
BFO:0000020
specifically
dependent continuant
node5->node6
node12
BFO:0000019
quality
node6->node12
node6->node6
node7
PATO:0000001
quality
node6->node7
node13
PATO:0001241
physical object
quality
node7->node13
node9
CO_324:0000025
sorghum stem
potassium content
trait
node8->node9
node10
PATO:0000141
structure
node11
PATO:0000025
composition
node10->node11
node11->node3
node12->node12
node14
PATO:0000051
morphology
node12->node14
node12->node13
node13->node14
node14->node10
node15
TO:0000387
plant trait
node15->node1