People are walking in a sunny plaza.
People are walking in a crowded mall.
Sunny plaza implies that we are outside while crowded suggest that you are indoors.
exists e1 s1 x1 x2.(in(e1,x2) & n_plaza(x2) & a_sunny(s1) & Theme(s1,x2) & Actor(e1,x1) & v_walk(e1) & n_people(x1))
exists e1 s1 x1 x2.(in(e1,x2) & n_mall(x2) & a_crowded(s1) & Theme(s1,x2) & Actor(e1,x1) & v_walk(e1) & n_people(x1))