Two people hiking on a trail outside of the city.
Two people are playing golf.
One cannot be hiking on a trail and playing golf simultaneously.
exists e1 x1 x2 x3 x4 x5.(n_city(x5) & a_topic(x1) & on(e1,x3) & of(x4,x5) & outside(x3,x4) & n_thing(x4) & n_trail(x3) & Actor(e1,x2) & v_hike(e1) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_golf(x2) & n_people(x1) & card_eq_2(x1))