People are looking at things at some kind of exhibit.
People are looking at things in a civil war exhibit.
The exhibit is not necessarily a civil war one.
exists e1 x1 x2 x3 x4.(at(e1,x2) & at(x2,x3) & of(x3,x4) & n_exhibit(x4) & n_kind(x3) & n_thing(x2) & Actor(e1,x1) & v_look(e1) & n_people(x1))
exists e1 s1 x1 x2 x3 x4.(at(e1,x2) & in(x2,x3) & n_exhibit(x3) & of(x3,x4) & n_war(x4) & a_civil(s1) & Theme(s1,x3) & n_thing(x2) & Actor(e1,x1) & v_look(e1) & n_people(x1))