Musicians perform outdoors.
People are performing at a fair.
Although the musicians are performing outdoors there is nothing to suggest that they are performing at a fair.
exists e1 x1 x2.(ne_nam_musicians(x1) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_outdoors(x2))
exists e1 x1 x2.(at(e1,x2) & n_fair(x2) & Actor(e1,x1) & v_perform(e1) & n_people(x1))