In a marsh type area, four small boys are digging in the mud.
There are four boys
Four small boys that are digging are four boys
exists e1 s1 s2 x1 x2 x3 x4.(n_mud(x2) & in(e1,x3) & n_area(x3) & of(x3,x4) & n_type(x4) & a_marsh(s2) & Theme(s2,x3) & in(e1,x2) & Actor(e1,x1) & v_dig(e1) & n_boy(x1) & a_small(s1) & Theme(s1,x1) & card_eq_4(x1))
exists p1 x1 x2.((x1 = x2) & n_boy(x2) & card_eq_4(x2))