The sky appears clear.
The sky appears to have no color
no color and clear are the same things because clear is not a color, it is colorless
exists e1 p1 x1.(n_sky(x1) & exists s1.(Theme(s1,x1) & a_clear(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_appear(e1))
exists e1 p1 x1.(n_sky(x1) & Topic(e1,p1) & Actor(e1,x1) & v_appear(e1) & -exists e2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_have(e2) & n_color(x2)))