A little boy in an apron helps his mother cook.
A young boy is operating a forklift.
A young boy would not be old enough to operate a forklift. A boy operating a forklift would not also be helping his mother cook.
exists e1 s1 x1 x2 x3 x4.(Theme(e1,x3) & Actor(e1,x1) & v_help(e1) & n_cook(x3) & of(x3,x4) & n_mother(x4) & of(x3,x1) & n_male(x1) & in(x1,x2) & n_apron(x2) & n_boy(x1) & a_little(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_operate(e1) & n_forklift(x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1))