A group of tennis players talking.
The tennis players are discussing the matches.
A group of tennis players talking does not imply they are discussing the matches, they could be discussing other issues.
exists e1 x1 x2 x3 x4.(a_topic(x1) & Actor(e1,x4) & v_talk(e1) & (x1 = x4) & of(x1,x2) & n_player(x2) & of(x2,x3) & n_tennis(x3) & n_group(x1))
exists e1 x1 x2 x3.(n_match(x3) & n_player(x1) & of(x1,x2) & n_tennis(x2) & Theme(e1,x3) & Actor(e1,x1) & v_discuss(e1))