An adult is assisting a child in the act of ice-skating.
A boy and his father are skating.
An adult could be a man or woman, and the child doesn't necessarily have a relation to the adult that is assisting them in ice-skating. The adult is not necessarily the father of the child, and the child isn't necessarily a boy.
exists e1 x1 x2 x3 x4.(n_act(x3) & in(e1,x3) & of(x3,x4) & n_ice-skating(x4) & Theme(e1,x2) & Actor(e1,x1) & v_assist(e1) & n_child(x2) & n_adult(x1))
exists e1 x1 x2 x3.(Actor(e1,x1) & v_skate(e1) & subset_of(x3,x1) & n_father(x3) & of(x3,x2) & n_male(x2) & subset_of(x2,x1) & n_boy(x2))