The lady in purple is pushing the child in a wagon.
The mother is helping her child move in his wagon.
A lady can interact with a child without being its mother, similarly just because she pushes the child in a wagon does not indicate that she is helping her child move.
exists e1 x1 x2 x3 x4.(n_child(x3) & n_lady(x1) & in(e1,x4) & n_wagon(x4) & Theme(e1,x3) & Actor(e1,x1) & v_push(e1) & in(x1,x2) & n_purple(x2))
exists e1 x1 x2 x3 x4.(n_wagon(x4) & of(x4,x2) & n_male(x2) & n_move(x2) & of(x2,x3) & n_child(x3) & of(x2,x1) & n_female(x1) & n_mother(x1) & in(e1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_help(e1))