Problem: Wwo sentences:
Doctors have speculated that estrogen protects against cell damage and improves blood flow .
Their belief was based on speculation that estrogen prevents cell damage and improves blood flow .
Do they have the same meaning?

Answer: yes

Problem: Wwo sentences:
The intelligence service , headed by Fujimori 's spy chief , Vladimiro Montesinos , was accused of torture , drug trafficking and disappearances .
The head of the intelligence service under Mr. Fujimori , Vladimiro Montesinos , was accused of tortures and disappearances .
Do they have the same meaning?

Answer: yes

Problem: Wwo sentences:
American has laid off 6,500 of its Missouri employees since Dec. 31 , according to Driskill .
Since October 2001 , American has laid off 6,149 flight attendants , according to George Price , a union spokesman .
Do they have the same meaning?

Answer: yes

Problem: Wwo sentences:
Shiite Muslims account for about a third of Quetta 's of 1.2 million people .
About 80 percent of Pakistan 's 140 million people are Sunnis .
Do they have the same meaning?

Answer:
no