Question: An edited version of "Just the Two of Us" reached number two on the "Billboard" Hot 100 behind a song written and composed by Donna Weiss and Jackie DeShannon which spend how many weeks at No. 1 on the "Billboard" hot 100?

Related documents: [0]  [DOC] "Bette Davis Eyes" is a song written and composed by Donna Weiss and Jackie DeShannon, and made popular by American singer Kim Carnes. DeShannon recorded it in 1974; Carnes's 1981 version spent nine weeks at No. 1 on the "Billboard" Hot 100 and was "Billboard"' s biggest hit of 1981. [END] 
[1]  [DOC] "Just the Two of Us" is a 1981 R&B single written by Bill Withers, William Salter and Ralph MacDonald, which was recorded by Grover Washington Jr. and Bill Withers. The song originally appeared on Washington's 1980 album "Winelight". An edited version reached number two on the "Billboard" Hot 100, staying there for 3 weeks, behind "Morning Train (9 to 5)" by Sheena Easton and "Bette Davis Eyes" by Kim Carnes. The song won a Grammy Award for Best R&B Song. Bill Withers included the edited version on the 1981 compilation "Bill Withers' Greatest Hits" and many subsequent greatest hits collections. [END]  
Answer: nine
nine