A male passenger listens to an iPod, while riding a train.
A male is dancing on the dance floor.
Dancing and riding cannot be done at the same time.
exists e2 e1 s1 x1 x2 x3.(while(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_ride(e2) & n_train(x3) & to(e1,x2) & n_ipod(x2) & Actor(e1,x1) & v_listen(e1) & n_passenger(x1) & a_male(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(n_floor(x2) & of(x2,x3) & n_dance(x3) & on(e1,x2) & Actor(e1,x1) & v_dance(e1) & n_male(x1))