A group of friends discussing what to do at the event.
There a bunch of people at the event.
Sentence 2 follows Sentence 1 as Sentence 1 shows a precursor to Sentence 2.  A group of friends are discussing what to do at the event, and then later they are at the event.
exists x1 x2 x3 x6.(n_event(x6) & a_topic(x1) & exists e1 p1 x4.(n_thing(x4) & Theme(e1,x4) & Actor(e1,x3) & v_discuss(e1) & exists e2 x5.(at(e2,x6) & Theme(e2,x4) & Actor(e2,x5) & v_do(e2) & n_thing(x5))) & (x1 = x3) & of(x1,x2) & n_friend(x2) & n_group(x1))
exists x3.(n_event(x3) & all x1.(n_bunch(x1) -> exists s1 x2.(a_topic(s1) & at(s1,x3) & of(s1,x2) & n_people(x2) & for(s1,x1))))