A group of people are listening to a presentation.
A group of people at a work presentation about safety issues
Listening to a presentation does not necessarily mean work presentation.
exists e1 x1 x2 x3.(to(e1,x3) & n_presentation(x3) & Actor(e1,x1) & v_listen(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists x1 x2 x3 x4 x5 x6.(a_topic(x1) & at(x1,x3) & about(x3,x5) & n_issue(x5) & of(x5,x6) & n_safety(x6) & n_presentation(x3) & of(x3,x4) & n_work(x4) & of(x1,x2) & n_people(x2) & n_group(x1))