A construction crew working on a building site.
The crew are on break.
One cannot be working and on a break simultaneously.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & on(e1,x4) & n_site(x4) & of(x4,x5) & n_building(x5) & Actor(e1,x3) & v_work(e1) & (x1 = x3) & n_crew(x1) & of(x1,x2) & n_construction(x2))
exists p1 x1.(n_crew(x1) & exists x2.(on(x1,x2) & n_break(x2)))