An unhappy woman walks down the street.
The woman can not stop smiling!
An unhappy person wouldn't be smiling.
exists e1 s1 s2 x1 x2.(n_street(x2) & a_down(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_woman(x1) & a_unhappy(s1) & Theme(s1,x1))
exists x1.(n_woman(x1) & -exists e1 p1.(exists e2 p2.(exists e3.(Actor(e3,x1) & v_smile(e3)) & Topic(e2,p2) & Actor(e2,x1) & v_stop(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_can(e1)))