a man stands next to motorcycles
A man is motorcycle shopping.
A man standing next to motorcycles does not imply he is shopping for a motorcycle.
exists e1 x1 x2.(to(e1,x2) & n_motorcycle(x2) & r_next(e1) & Actor(e1,x1) & v_stand(e1) & n_man(x1))
exists p1 x1.(exists s1 x2.((x1 = x2) & n_shopping(x2) & a_motorcycle(s1) & Theme(s1,x2)) & n_man(x1))