Three African Americans are in the middle of a muddy stream in a blue boat.
there is a pure water no chance of muddy stuff
Pure water is not muddy.
exists p1 s1 x1 x2.(n_middle(x2) & exists s2 s3 x3 x4.(in(x1,x2) & of(x2,x3) & in(x3,x4) & n_boat(x4) & a_blue(s3) & Theme(s3,x4) & n_stream(x3) & a_muddy(s2) & Theme(s2,x3)) & n_american(x1) & a_african(s1) & Theme(s1,x1) & card_eq_3(x1))
exists p1 x1 s1 s2 x2 x3 x4.((x1 = x2) & of(x2,x4) & n_stuff(x4) & a_muddy(s2) & Theme(s2,x4) & n_chance(x3) & rel(x2,x3) & n_water(x2) & a_pure(s1) & Theme(s1,x2))