Group showing books they received at event.
The group is at the event
The group could have left the event and be discussing the event later, or at another location.
exists e1 e2 s1 x1 x2 x3 x4.(ne_org_group(s1) & a_topic(s1) & Theme(e2,x2) & Actor(e2,x1) & v_show(e2) & at(e1,x4) & n_event(x4) & Theme(e1,x3) & Actor(e1,x2) & v_receive(e1) & (x2 = x3) & n_thing(x2) & n_book(x2) & (s1 = x1))
exists p1 x1 x2.(n_event(x2) & n_group(x1) & at(x1,x2))