People are walking through a mall.
The mall is open.
if people are walking through the mall, the mall is open.
exists e1 x1 x2.(through(e1,x2) & n_mall(x2) & Actor(e1,x1) & v_walk(e1) & n_people(x1))
exists s1 x1.(n_mall(x1) & Theme(s1,x1) & a_open(s1))