A brown dog walking on a frozen lake carrying a stick.
The ice is the picture is very thick.
The fact that brown dog walking on a frozen lake carrying a stick doesn't imply that the description is that of a picture. Not all frozen lakes have thick ihce.
exists e1 s1 s2 x1 x2 x3 x4 x5.(a_topic(x1) & on(x1,x3) & Theme(e1,x5) & Actor(e1,x4) & v_carry(e1) & n_stick(x5) & (x3 = x4) & n_lake(x3) & a_frozen(s2) & Theme(s2,x3) & n_walking(x1) & of(x1,x2) & n_dog(x2) & a_brown(s1) & Theme(s1,x1))
exists p1 x1 x2.(n_picture(x2) & n_ice(x1) & exists s1 x3.((x1 = x2) & r_very(s1) & Theme(s1,x3) & a_thick(s1) & (x2 = x3)))