Young men and women sit at a picnic table in a park.
Nobody is sitting.
Young men and women sitting in a park.
exists e1 s1 x1 x2 x3 x4 x5 x6.(in(e1,x6) & n_park(x6) & at(e1,x4) & n_table(x4) & of(x4,x5) & n_picnic(x5) & Actor(e1,x1) & v_sit(e1) & n_woman(x3) & n_man(x2) & subset_of(x3,x1) & subset_of(x2,x1) & a_young(s1) & Theme(s1,x1))
-exists e1 x1.(Actor(e1,x1) & v_sit(e1) & n_person(x1))