The New Wiper Blades<br>Mary was having trouble seeing out of her windshield. Her wiper blades weren't working properly. Mary stopped at a car parts store. She found the proper sized blades. Mary bought the blades and installed them on her car.
Mary drove to a car parts store. 
The text says Mary stopped at a car parts store - not how she got there. Not sure why the model thought the statement was incorrect, though. Maybe it thought the car was broken?
( z1 drive :ARG0 ( z2 person :name ( z3 name :op "Mary" ) ) :destination ( z4 store :mod ( z5 part :part-of ( z6 car ) ) ) )