A man wearing glasses stands in front of a snowy mountain.
The man is hiking.
Not all men wearing glasses stands in front of a snowy mountain are hiking.
exists e1 s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & in(x3,x5) & of(x5,x6) & n_mountain(x6) & a_snowy(s1) & Theme(s1,x6) & n_front(x5) & n_stand(x3) & of(x3,x4) & n_glass(x4) & (x1 = x2) & n_man(x1))
exists e1 x1.(n_man(x1) & Actor(e1,x1) & v_hike(e1))