The Trees<br>The company's headquarters was finished. They planted some trees in front as a finishing touch. The trees made shade in the grass. The employees could imagine sitting in the shade on their lunch break. The building was going to be a great new location for them!
The shade from the trees is only available a certain time of day. 
( z1 available :ARG2 ( z2 shade :source ( z3 tree ) ) :mod ( z4 only ) :time ( z5 time :mod ( z6 certain ) :part-of ( z7 day ) ) )