A boy in red jumps backward onto the sand at a playground.
A boy in red jumps backwards into the sand.
backward onto can be rephrased as backwards into
exists s1 x1 x2 x3 x4.(n_sand(x3) & a_topic(x1) & in(x1,x2) & at(x2,x4) & n_playground(x4) & n_backward(x2) & onto(x2,x3) & n_jump(x2) & a_red(s1) & Theme(s1,x2) & n_boy(x1))
exists s1 x1 x2 x3 x4.(n_sand(x4) & a_topic(x1) & into(x1,x4) & in(x1,x2) & n_backward(x2) & of(x2,x3) & n_jump(x3) & a_red(s1) & Theme(s1,x2) & n_boy(x1))