A boy and a girl are walking in a mall.
A boy and a girl walking inside a shopping center
A mall is a shopping center.
exists e1 x1 x2 x3 x4.(in(e1,x4) & n_mall(x4) & Actor(e1,x1) & v_walk(e1) & subset_of(x3,x1) & n_girl(x3) & subset_of(x2,x1) & n_boy(x2))
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(s1) & subset_of(x2,s1) & inside(e1,x4) & n_center(x4) & of(x4,x5) & n_shopping(x5) & Actor(e1,x3) & v_walk(e1) & (x2 = x3) & n_girl(x2) & subset_of(x1,s1) & n_boy(x1))