cloudy
             ^
             |
             |
             |             
            / \
           /   \
          /     \
         /       \
     sprinkler   rain
        \        /
         \      /
          \    /
           \  /
            \/
            ^
         wetgrass

##</code><code>##

Node: wetgrass
Participating Nodes: rain, sprinkler, wetgrass 
rain => T, sprinkler => T, wetgrass => T = CPT of 1
...