premise: A skateboarder does a trick at a skate park.
hypothesis: The skateboarder is at a concert with his girlfriend.
explanation_1: People don't usually do tricks at a concert, and concerts aren't normally held at skate parks.
explanation_2: park doesn't mean concert
explanation_3: A skateboarder cannot be at a skate park and a concert at the same time.
premise_logic: exists e1 x1 x2 x3 x4.(at(e1,x3) & n_park(x3) & of(x3,x4) & n_skate(x4) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2) & n_skateboarder(x1))
hypothesis_logic: exists p1 x1 x3.(n_girlfriend(x3) & of(x3,x1) & n_male(x1) & n_skateboarder(x1) & exists x2.(at(x1,x2) & with(x2,x3) & n_concert(x2)))