Rugby players competing in a match.
A rugby match is going on.
If a rugby match is going on, rugby players must be competing.
exists e1 x1 x2 x3 x4.(a_topic(x1) & in(e1,x4) & n_match(x4) & Actor(e1,x3) & v_compete(e1) & (x1 = x3) & n_player(x1) & (x1 = x2) & ne_nam_rugby(x2))
exists e1 s1 s2 x1.(a_on(s2) & Manner(e1,s2) & Actor(e1,x1) & v_go(e1) & n_match(x1) & a_rugby(s1) & Theme(s1,x1))