test
node1
RO:0002310
exposure event or
process
node2
PECO:0007158
sandy soil exposure
node1->node2
node3
PECO:0007155
soil type exposure
node3->node2
node4
PECO:0007359
plant experimental
condition
node5
PECO:0001001
plant exposure
node4->node5
node6
PECO:0007191
abiotic plant
exposure
node5->node6
node9
PECO:0007147
plant growth medium
exposure
node6->node9
node7
BFO:0000003
occurrent
node7->node7
node8
BFO:0000015
process
node7->node8
node8->node1
node10
PECO:0007049
soil environment
exposure
node9->node10
node10->node3
node11
BFO:0000001
entity
node11->node7