Families are gathered in a park.
The park has people in it
THERE ARE PEOPLE IN THE PARK.
exists e1 x1 x2.(in(e1,x2) & n_park(x2) & Theme(e1,x1) & v_gather(e1) & n_family(x1))
exists e1 x1 x2.(n_thing(x1) & n_park(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & in(x2,x1) & n_people(x2))