A competitor does a pole vault.
The athlete is practicing his favorite event.
An athlete does not necessarily mean a competitor, and the pole vault does not have to be his favorite event just because he might be practicing it.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_vault(x2) & of(x2,x3) & n_pole(x3) & n_competitor(x1))
exists e1 s1 x1 x2.(n_event(x2) & a_favorite(s1) & Theme(s1,x2) & of(x2,x1) & n_male(x1) & n_athlete(x1) & Theme(e1,x2) & Actor(e1,x1) & v_practice(e1))