The young men are playing Rugby and are on opposite teams.
The men are playing rugby for the same team.
People who play for opposite teams do not play on the same team.
exists e1 p1 s1 s2 x1 x2.(n_man(x1) & a_young(s2) & Theme(s2,x1) & ne_nam_rugby(x2) & a_young(s1) & Theme(s1,x1) & exists s3 x3.(on(x1,x3) & n_team(x3) & a_opposite(s3) & Theme(s3,x3)) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1))
exists e1 s1 x1 x2 x3.(n_team(x3) & a_same(s1) & Theme(s1,x3) & n_man(x1) & for(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_rugby(x2))