Families are playing at the park on tire swings.
The park is completely deserted.
There cannot be families playing at the park at the same time the park is completely deserted.
exists e1 x1 x2 x3 x4.(n_park(x2) & at(e1,x2) & on(x2,x3) & n_swing(x3) & of(x3,x4) & n_tire(x4) & Actor(e1,x1) & v_play(e1) & n_family(x1))
exists e1 s1 x1.(n_park(x1) & a_completely(s1) & Manner(e1,s1) & Theme(e1,x1) & v_desert(e1))