Towing<br>Last week we saw a police car in front of a parked car. The car was parked in front of a fire hydrant. A tow truck tried to get the car but it was blocked in. The company called in a flatbed tow truck. Before they could tow the car the driver came and drove away.
The police car was not in front of the fire hydrant. 
The passage states that the police car was parked in front of the car, not in front of the fire hydrant. 
( z1 be-located-at :polarity - :ARG1 ( z2 car :mod ( z3 police ) ) :ARG2 ( z4 in-front-of :op ( z5 hydrant :mod ( z6 fire ) ) ) )