A man sits on a non-moving motorcycle
An old man is on a motorcycle.
There is no evidence as to the age of the man. He could be old or he could be young.
exists e1 s1 x1 x2.(on(e1,x2) & n_motorcycle(x2) & a_non-moving(s1) & Theme(s1,x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists p1 s1 x1.(exists x2.(on(x1,x2) & n_motorcycle(x2)) & n_man(x1) & a_old(s1) & Theme(s1,x1))