The football player is running with a football trying to score.
The boy is about to score in a high school football game.
A football player is not necessarily a boy.  Trying to score does not imply about to score.  Not all football games are high school football games.
exists e1 e2 x1 x2 x3 x4.(for(e1,e2) & with(e2,x2) & n_football(x2) & n_football(x2) & Actor(e2,x1) & v_run(e2) & to(e1,x4) & n_score(x4) & Theme(e1,x3) & Actor(e1,x1) & v_try(e1) & n_thing(x3) & n_player(x1) & of(x1,x2))
exists p1 s1 x1.(n_boy(x1) & a_about(s1) & Manner(p1,s1) & exists s2 x2 x3 x4 x5.(to(x1,x2) & in(x2,x3) & n_game(x3) & of(x3,x5) & n_football(x5) & of(x3,x4) & n_school(x4) & a_high(s2) & Theme(s2,x3) & n_score(x2)))