Grapes<br>Henry bought a huge bag of grapes. He wondered how he would eat them all. He decided he would juice them instead. He shared his juice with his wife. He went and bought more grapes.
Henry's wife has a husband. 
Henry has a wife, which means his wife automatically has a husband (Henry).  The system found it difficult because it did not understand the meaning of the word "husband".  
( z1 have-rel-role :ARG0 ( z2 person :ARG0-of ( z3 have-rel-role :ARG1 ( z4 person :name ( z5 name :op "Henry" ) ) :ARG2 ( z6 wife ) ) ) :ARG1 z4 :ARG2 ( z7 husband ) )