A group of people enjoying a beautiful day in the park.
Friends are at the park.
A group of people do not have to be friends.
exists e1 s1 x1 x2 x3 x4 x5.(n_park(x5) & a_topic(x1) & of(x1,x2) & in(e1,x5) & Theme(e1,x4) & Actor(e1,x3) & v_enjoy(e1) & n_day(x4) & a_beautiful(s1) & Theme(s1,x4) & (x2 = x3) & n_people(x2) & n_group(x1))
exists p1 x1 x2.(n_park(x2) & at(x1,x2) & n_friend(x1))