A bunch of people swimming in water.
People are outside.
swimming in water often happen outside.
exists e1 x1 x2 x3 x4.(a_topic(x1) & in(e1,x4) & n_water(x4) & Actor(e1,x3) & v_swim(e1) & (x1 = x3) & of(x1,x2) & n_people(x2) & n_bunch(x1))
exists s1 x1.(Theme(s1,x1) & a_outside(s1) & n_people(x1))