test
node1
PATO:0000025
composition
node2
TO:0001024
phosphorus content
node1->node2
node3
TO:0000277
biochemical trait
node4
TO:0000465
mineral and ion
content trait
node3->node4
node4->node2
node5
BFO:0000001
entity
node6
BFO:0000002
continuant
node5->node6
node6->node6
node7
BFO:0000020
specifically
dependent continuant
node6->node7
node10
BFO:0000019
quality
node7->node10
node7->node7
node8
PATO:0000001
quality
node7->node8
node11
PATO:0001241
physical object
quality
node8->node11
node9
PATO:0000141
structure
node9->node1
node10->node10
node12
PATO:0000051
morphology
node10->node12
node10->node11
node11->node12
node12->node9
node13
TO:0000387
plant trait
node13->node3