People gathered for a presentation.
Some people are inside.
Not all presentations are inside. This might have been a presentation in the park.
exists e1 x1 x2.(for(e1,x2) & n_presentation(x2) & Actor(e1,x1) & v_gather(e1) & n_people(x1))
exists e1 s1 x1.(a_inside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_be(e1) & n_people(x1))