test
node1
RO:0002310
exposure event or
process
node2
PECO:0007110
dsRNA virus exposure
node1->node2
node3
PECO:0007357
biotic plant exposure
node4
PECO:0007210
virus plant exposure
node3->node4
node4->node2
node5
PECO:0007359
plant experimental
condition
node6
PECO:0001001
plant exposure
node5->node6
node6->node3
node7
BFO:0000003
occurrent
node7->node7
node8
BFO:0000015
process
node7->node8
node8->node1
node9
BFO:0000001
entity
node9->node7