Child in pink and white skiing down a slope.
The child was skiing.
Skiing down a slope is the same thing as saying that the child was skiing.
exists s1 s2 x1 x2 x3.(a_topic(x1) & in(x1,x2) & down(x2,x3) & n_slope(x3) & n_skiing(x2) & a_white(s2) & Theme(s2,x2) & a_pink(s1) & Theme(s1,x2) & n_child(x1))
exists p1 x1.(n_child(x1) & exists x2.((x1 = x2) & n_skiing(x2)))