An old man drives a go-cart with a little boy.
A man rides a mini bike.
A go-cart and a mini bike are different things which can be driven.
exists e1 s1 s2 x1 x2 x3.(with(e1,x3) & n_boy(x3) & a_little(s2) & Theme(s2,x3) & Theme(e1,x2) & Actor(e1,x1) & v_drive(e1) & n_go-cart(x2) & n_man(x1) & a_old(s1) & Theme(s1,x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & a_mini(s1) & Theme(s1,x2) & n_man(x1))