A man with sunglasses looking straight ahead.
The man has bad eyesight.
Having sunglasses does not imply bad eyesight.
exists e1 s1 x1 x2 x3.(a_topic(x1) & with(x1,x2) & r_straight(e1) & a_ahead(s1) & Manner(e1,s1) & Actor(e1,x3) & v_look(e1) & (x2 = x3) & n_sunglass(x2) & n_man(x1))
exists e1 s1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_eyesight(x2) & a_bad(s1) & Theme(s1,x2))