A white boat on glassy water with mountains in the background.
The black boat on glassy water heads away from the mountains.
It is unlikely that a boat would be described as being both fully black and fully white.
exists s1 s2 x1 x2 x3 x4.(n_background(x4) & a_topic(x1) & with(x1,x3) & in(x3,x4) & n_mountain(x3) & on(x1,x2) & n_water(x2) & a_glassy(s2) & Theme(s2,x2) & n_boat(x1) & a_white(s1) & Theme(s1,x1))
exists s1 s2 x1 x2 x3 x4 x5.(n_mountain(x5) & n_boat(x1) & a_black(s1) & Theme(s1,x1) & a_topic(x1) & on(x1,x2) & from(x4,x5) & away(x2,x4) & n_thing(x4) & n_head(x2) & of(x2,x3) & n_water(x3) & a_glassy(s2) & Theme(s2,x2))