A couple walks through a busy area with a lot of people.
A couple is sitting at the park.
One cannot walk while sitting at the same time.
exists e1 s1 x1 x2 x3 x4.(through(e1,x2) & with(x2,x3) & of(x3,x4) & n_people(x4) & n_lot(x3) & n_area(x2) & a_busy(s1) & Theme(s1,x2) & Actor(e1,x1) & v_walk(e1) & n_couple(x1))
exists e1 x1 x2.(n_park(x2) & at(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_couple(x1))