An old man is walking in bad weather.
An old man is walking.
If an old man is walking in bad weather, he must be walking.
exists e1 s1 s2 x1 x2.(in(e1,x2) & n_weather(x2) & a_bad(s2) & Theme(s2,x2) & Actor(e1,x1) & v_walk(e1) & n_man(x1) & a_old(s1) & Theme(s1,x1))
exists e1 s1 x1.(Actor(e1,x1) & v_walk(e1) & n_man(x1) & a_old(s1) & Theme(s1,x1))