A few people sitting on a pier looking at a lake.
A group of people are watching the sun go down over the lake.
A group can be doing other activities at a lake besides watching the sun go down.
exists e2 e1 s1 x1 x2 x3 x4.(a_topic(x1) & for(e1,e2) & at(e2,x4) & n_lake(x4) & Actor(e2,x2) & v_look(e2) & on(e1,x3) & n_pier(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_people(x1) & a_few(s1) & Theme(s1,x1))
exists e2 e1 s1 x1 x2 x3 x4 x5.(n_lake(x5) & n_sun(x4) & over(e2,x5) & a_down(s1) & Manner(e2,s1) & Actor(e2,x1) & v_go(e2) & of(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_watch(e1) & (x2 = x3) & n_people(x2) & n_group(x1))