A child having a pleasant time in a swing
A child is on a swing
A child is on a swing is part of his overall description of him/her having a pleasant time.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_have(e1) & in(x3,x4) & n_swing(x4) & n_time(x3) & a_pleasant(s1) & Theme(s1,x3) & (x1 = x2) & n_child(x1))
exists p1 x1.(exists x2.(on(x1,x2) & n_swing(x2)) & n_child(x1))