Four boys are sitting in a muddy stream.
the kids sit by the stream
Boys are kids.
exists e1 s1 x1 x2.(in(e1,x2) & n_stream(x2) & a_muddy(s1) & Theme(s1,x2) & Actor(e1,x1) & v_sit(e1) & n_boy(x1) & card_eq_4(x1))
exists e1 x1 x2.(n_stream(x2) & n_kid(x1) & by(e1,x2) & Actor(e1,x1) & v_sit(e1))