A large gathering of people at a park.
A group of people are outside.
If people are gathering at a park, they must be outside.
exists s1 x1 x2 x3.(a_topic(x1) & of(x1,x2) & at(x2,x3) & n_park(x3) & n_people(x2) & n_gathering(x1) & a_large(s1) & Theme(s1,x1))
exists s1 x1 x2.(Theme(s1,x1) & a_outside(s1) & of(x1,x2) & n_people(x2) & n_group(x1))