A toddler boy rides the playground horse.
A toddler is swimming at the beach.
The boy cannot be swimming if he is riding the playground horse.
exists e1 x1 x2 x3 x4.(n_horse(x3) & of(x3,x4) & n_playground(x4) & Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_boy(x1) & of(x1,x2) & n_toddler(x2))
exists e1 x1 x2.(n_beach(x2) & at(e1,x2) & Actor(e1,x1) & v_swim(e1) & n_toddler(x1))