A soccer player is laying down injured being assisted by the referee and another player.
A soccer player has hurt his knee.
The soccer player may not have injured his knee
exists e2 e1 s1 x1 x2 x3 x4 x5 x6 x7.(n_referee(x6) & a_down(s1) & Manner(e2,s1) & Theme(e2,x3) & Actor(e2,x1) & v_lay(e2) & Actor(e1,x5) & subset_of(x7,x5) & n_player(x7) & -(x7 = x1) & n_player(x1) & n_player(x1) & subset_of(x6,x5) & Theme(e1,x4) & v_assist(e1) & (x3 = x4) & n_injured(x3) & of(x1,x2) & n_soccer(x2))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_hurt(e1) & n_knee(x3) & of(x3,x1) & n_male(x1) & n_player(x1) & of(x1,x2) & n_soccer(x2))