A group of people sitting on benches at a city park.
A married couple sit in the park under an umbrella.
A group of people typically indicates three or more people, as where a married couple consists of two people.
exists e1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & of(x1,x2) & at(e1,x5) & n_park(x5) & of(x5,x6) & n_city(x6) & on(e1,x4) & n_bench(x4) & Actor(e1,x3) & v_sit(e1) & (x2 = x3) & n_people(x2) & n_group(x1))
exists e1 s1 x1 x2 x3.(n_park(x2) & under(e1,x3) & n_umbrella(x3) & in(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_couple(x1) & a_married(s1) & Theme(s1,x1))