Four young lacrosse players are running down the field.
The boys are trying to catch the ball.
Just because the boys are running down the field to catch the ball does not make them lacrosse players.
exists e1 s1 x1 x2 x3.(n_field(x3) & down(e1,x3) & Actor(e1,x1) & v_run(e1) & n_player(x1) & of(x1,x2) & n_lacrosse(x2) & a_young(s1) & Theme(s1,x1) & card_eq_4(x1))
exists e1 p1 x1 x2.(n_ball(x2) & n_boy(x1) & Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2.(Theme(e2,x2) & Actor(e2,x1) & v_catch(e2)))