A football player in a red jersey is tackling a football player in a white jersey who is attempting to throw the ball.
The quarterback is sacked for a loss.
A football player tackling another does not imply the quarterback was sacked for a loss.
exists e1 e2 p1 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8.(n_ball(x8) & Theme(e2,x4) & Actor(e2,x1) & v_tackle(e2) & in(x4,x6) & Topic(e1,p1) & Actor(e1,x7) & v_attempt(e1) & exists e3.(Theme(e3,x8) & Actor(e3,x7) & v_throw(e3)) & (x6 = x7) & n_jersey(x6) & a_white(s2) & Theme(s2,x6) & n_player(x4) & of(x4,x5) & n_football(x5) & in(x1,x3) & n_jersey(x3) & a_red(s1) & Theme(s1,x3) & n_player(x1) & of(x1,x2) & n_football(x2))
exists e1 x1 x2.(n_quarterback(x1) & for(e1,x2) & n_loss(x2) & Theme(e1,x1) & v_sack(e1))