test
node1
PECO:0007359
plant experimental
condition
node2
PECO:0001001
plant exposure
node1->node2
node5
PECO:0007191
abiotic plant
exposure
node2->node5
node3
PECO:0007149
chemical mutagen
exposure
node4
PECO:0007554
N-nitrosodimethylami
e exposure
node3->node4
node7
PECO:0007189
chemical exposure
node5->node7
node6
BFO:0000003
occurrent
node6->node6
node8
BFO:0000015
process
node6->node8
node7->node3
node9
RO:0002310
exposure event or
process
node8->node9
node9->node4
node10
BFO:0000001
entity
node10->node6