person on a wakeboard in the air
Tim eats a sandwich in front of his house.
The person can't be on a wakeboard and eating a sandwich at the same time.
exists x1 x2 x3.(n_air(x3) & a_topic(x1) & on(x1,x2) & in(x2,x3) & n_wakeboard(x2) & n_person(x1))
exists e1 x1 x2 x3 x4.(n_house(x4) & of(x4,x1) & n_male(x1) & ne_per_tim(x1) & in(e1,x3) & of(x3,x4) & n_front(x3) & Theme(e1,x2) & Actor(e1,x1) & v_eat(e1) & n_sandwich(x2))