Two people throwing a frisbee.
people playing a game at the park
People can throw a frisbee and not necessarily be at the park.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_throw(e1) & n_frisbee(x3) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2 x3 x4.(n_park(x4) & a_topic(x1) & at(e1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_game(x3) & (x1 = x2) & n_people(x1))