Problem: Wwo sentences:
He urged the US to provide clear rules on what would happen at possible trials .
Government sources said Mr Howard urged the US to provide clear rules governing any potential trials .
Do they have the same meaning?

Answer: yes

Problem: Wwo sentences:
She has a boyfriend , too , officials said : Sgt. Ruben Contreras , who sat with her family Tuesday .
She also thanked her boyfriend , Sgt. Ruben Contreras , who was sitting next to the stage .
Do they have the same meaning?

Answer: no

Problem: Wwo sentences:
In Falluja on Thursday , two grenades were thrown at soldiers from the Third Armored Cavalry Regiment , wounding seven .
In Al-Fallujah , two grenades were thrown Thursday at soldiers from the 3rd Armored Cavalry Regiment , wounding seven , none seriously .
Do they have the same meaning?

Answer: yes

Problem: Wwo sentences:
He said it was not possible to rule out that the chemical was a cancer risk to humans .
However , it is not possible to say whether it may pose a cancer risk to humans .
Do they have the same meaning?

Answer:
yes