The boys wearing the purple uniforms tackled number 25.
The boys tackled the football player.
WE DON'T KNOW THAT NUMBER 25 IS A FOOTBALL PLAYER.
exists e1 e2 s1 x1 x2 x3 x4.(n_purple(x3) & n_boy(x1) & Theme(e2,x4) & Actor(e2,x1) & v_uniform(e2) & n_number(x4) & n_date(x4) & a_date_day_25(x4) & a_date_day_25(x4) & a_tackled(s1) & Theme(s1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & (x1 = x2))
exists e1 x1 x2 x3.(n_player(x2) & of(x2,x3) & n_football(x3) & n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_tackle(e1))