Getting a Minivan<br>Tom's wife was pregnant. They needed to get a family vehicle. Tom decided to get a minivan. He actually liked most of them. He picked a new model with several features.
The pregnancy prompted Tom to get a new vehicle
Though it is implied that the pregnancy influenced them getting a new vehicle, there could have been other factors that influenced the decision. As such, the statement fits in the neither category. The system may have assumed that the pregnancy caused the vehicle search. 
( z1 prompt :ARG0 ( z2 pregnancy ) :ARG1 ( z3 get :ARG0 ( z4 person :name ( z5 name :op "Tom" ) ) :ARG1 ( z6 vehicle :ARG1-of ( z7 new ) ) ) )