Construction workers examining a problem.
Dogs are examining a problem.
They are either dogs or construction workers.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_examine(e1) & n_problem(x3) & n_worker(x1) & of(x1,x2) & n_construction(x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_examine(e1) & n_problem(x2) & n_dog(x1))