A football player in possession of the ball gets tackled by a football player on the opposing team.
A football player tackles a quarterback.
It is unknown what position the football player who was tackled is playing, he may not be a quarterback.
exists e1 p1 s1 x1 x2 x3 x4 x7.(n_team(x7) & a_opposing(s1) & Theme(s1,x7) & n_ball(x4) & exists e2 x5 x6.(Actor(e2,x5) & on(x5,x7) & n_player(x5) & of(x5,x6) & n_football(x6) & Theme(e2,x1) & v_tackle(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_get(e1) & in(x1,x3) & of(x3,x4) & n_possession(x3) & n_player(x1) & of(x1,x2) & n_football(x2))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_tackle(e1) & n_quarterback(x3) & n_player(x1) & of(x1,x2) & n_football(x2))