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 company headquarters is taller than one story. 
I'm not sure why the system was fooled. The statement doesn't include how tall the company building is, so the statement that it is taller than one story could be correct or incorrect. 
( z1 have-degree :ARG1 ( z2 headquarters :poss ( z3 company ) ) :ARG2 ( z4 tall ) :ARG3 ( z5 more ) :ARG4 ( z6 story :quant 1 ) )