A swimmer takes a breath in the middle of a race.
A dog barks at a bird.
He refers to swimmer and not a dog.  One would not be taking a breath and barking at the same time.
exists e1 x1 x2 x3 x4.(n_middle(x3) & in(e1,x3) & of(x3,x4) & n_race(x4) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_breath(x2) & n_swimmer(x1))
exists e1 x1 x2.(at(e1,x2) & n_bird(x2) & Actor(e1,x1) & v_bark(e1) & n_dog(x1))