A person walks up a white sandy hill against the blue sky.
A person is walking up a sandy hill along a coastline with a blue sky in the background.
All Sandy hills are not along a coastline. Also, does not imply the blue sky is in the background.
exists e1 s1 s2 s3 x1 x2 x3 x4.(n_sky(x4) & a_blue(s2) & Theme(s2,x4) & a_up(s3) & Manner(e1,s3) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & against(x2,x4) & n_hill(x2) & of(x2,x3) & n_sandy(x3) & a_white(s1) & Theme(s1,x2) & n_person(x1))
exists e1 s1 s2 x1 x2 x3 x4 x5 x6.(n_background(x6) & along(e1,x4) & with(x4,x5) & in(x5,x6) & n_sky(x5) & a_blue(s2) & Theme(s2,x5) & n_coastline(x4) & a_up(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_hill(x2) & of(x2,x3) & n_sandy(x3) & n_person(x1))