Some young girls in swimsuits playing volleyball on a sandy field.
Girls are in swimsuits playing volleyball.
Both sentences describe girls in swimsuits playing volleyball.  Sentence 1 gives more detail about where they are playing.
exists e1 s1 s2 x1 x2 x3 x4 x5.(a_topic(x1) & in(x1,x2) & on(e1,x5) & n_field(x5) & a_sandy(s2) & Theme(s2,x5) & Theme(e1,x4) & Actor(e1,x3) & v_play(e1) & n_volleyball(x4) & (x2 = x3) & n_swimsuit(x2) & n_girl(x1) & a_young(s1) & Theme(s1,x1))
exists p1 x1.(exists e1 x2 x3 x4.(in(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_play(e1) & n_volleyball(x4) & (x2 = x3) & n_swimsuit(x2)) & n_girl(x1))