51.   Neeson said acting on stage and on film both present unique challenges on a daily basis.

52.   Political strategists say Ashcroft has a unique challenge in the final week of the campaign because he is running against the memory of a popular but dead governor.

53.   The Navy brass knows the Gulf presents unique challenges.

54.   We realize that Russia has had to face and will continue to face unique challenges.

55.   But it also poses unique challenges, forcing community leaders to organize in numerous languages and across still-fresh cultural lines.

56.   The nerves and the course and the head-to-head nature of the event make the Ryder Cup a unique challenge for the sport.