People sitting on the ground watching a sunrise or sunset behind a mountain.
A group of people watching the sun move.
At the time of either sunrise or sunset, the sun appears to move.
exists e1 e2 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 x5.(n_move(x4) & of(x4,x5) & n_sun(x5) & a_topic(x1) & of(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_watch(e1) & (x2 = x3) & n_people(x2) & n_group(x1))