A group of people rest on a rail in a shopping center.
Some humans are indoors.
Some humans are a group of people. If they are in a shopping center then they are indoors.
exists e1 x1 x2 x3 x4 x5.(in(e1,x4) & n_center(x4) & of(x4,x5) & n_shopping(x5) & on(e1,x3) & n_rail(x3) & Actor(e1,x1) & v_rest(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists p1 x1.(exists x2.((x1 = x2) & n_indoor(x2)) & n_human(x1))