People sitting on the ground watching a sunrise or sunset behind a mountain.
A group of people sleeping in a tent.
One can't be watching something and sleep simultaneously.
exists e2 e1 x1 x2 x3 x4 x5.(n_ground(x3) & a_topic(x1) & for(e1,e2) & behind(e2,x5) & n_mountain(x5) & Theme(e2,x4) & Actor(e2,x2) & v_watch(e2) & (n_sunrise(x4) | n_sunset(x4)) & on(e1,x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_people(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & in(e1,x4) & n_tent(x4) & Actor(e1,x3) & v_sleep(e1) & (x2 = x3) & n_people(x2) & n_group(x1))