People are gathered at a business conference.
Friends hanging out at baseball game
Friends at a baseball game are not people at a business conference.
exists e1 x1 x2 x3.(at(e1,x2) & n_conference(x2) & of(x2,x3) & n_business(x3) & Theme(e1,x1) & v_gather(e1) & n_people(x1))
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & at(e1,x3) & n_game(x3) & of(x3,x4) & n_baseball(x4) & a_out(s1) & Manner(e1,s1) & Actor(e1,x2) & v_hang(e1) & (x1 = x2) & n_friend(x1))