Crowd gathered in city park.
The crowd was gathered for a orgy in city park.
A crowd cannot be gathered in city park and be gathered for and orgy in city park at the same time.
exists e1 x1 x2 x3.(ne_nam_crowd(x1) & in(e1,x2) & n_park(x2) & of(x2,x3) & n_city(x3) & Actor(e1,x1) & v_gather(e1))
exists e1 x1 x2 x3 x4.(n_crowd(x1) & in(e1,x3) & n_park(x3) & of(x3,x4) & n_city(x4) & for(e1,x2) & n_orgy(x2) & Theme(e1,x1) & v_gather(e1))