A rugby match in progress is shown with the referee watching.
There are athletes playing a game.
If a rugby match is in progress, it's implied that there are athletes.
exists e1 s1 x1 x2 x3 x4.(n_watching(x3) & of(x3,x4) & n_referee(x4) & with(e1,x3) & Theme(e1,x1) & v_show(e1) & in(x1,x2) & n_progress(x2) & n_match(x1) & a_rugby(s1) & Theme(s1,x1))
exists p1 x1 e1 x2 x3 x4.((x1 = x2) & Theme(e1,x4) & Actor(e1,x3) & v_play(e1) & n_game(x4) & (x2 = x3) & n_athlete(x2))