A group of people are attending a conference.
People are coming together.
Just because people are attending a conferences does not mean they are coming together.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_attend(e1) & n_conference(x3) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 p1 x1.(exists s1.(Theme(s1,x1) & a_together(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_come(e1) & n_people(x1))