The rugby players play on a field.
The players are outside.
a field is always outside.
exists e1 x1 x2 x3.(n_player(x1) & of(x1,x2) & n_rugby(x2) & on(e1,x3) & n_field(x3) & Actor(e1,x1) & v_play(e1))
exists s1 x1.(n_player(x1) & Theme(s1,x1) & a_outside(s1))