Context: Comcast sold Comcast Cellular to SBC Communications in 1999 for $400 million, releasing them from $1.27 billion in debt. Comcast acquired Greater Philadelphia Cablevision in 1999. In March 1999, Comcast offered to buy MediaOne for $60 billion. However, MediaOne decided to accept AT&T Corporation's offer of $62 billion instead. Comcast University started in 1999 as well as Comcast Interactive Capital Group to make technology and Internet related investments taking its first investment in VeriSign.

Question: What was Comcast's telecommunication business prior to 1999?
Answer: Comcast Cellular

Question: What company did Comcast sell their telecommunications company to?
Answer: SBC Communications

Question: How much was ComCast Cellular sold for in 1999?
Answer: $400 million

Question: What internet commerce company did Comcast invest in?
Answer: VeriSign

Question: MediaOne merged with what telecommunications company?
Answer: AT&T Corporation

Question: How much did Comcast pay to purchase Greater Philadelphia Cablvision?
Answer: Unanswerable

Question: What company turned down AT&T's offer?
Answer: Unanswerable

Question: What month did VeriSign start?
Answer: Unanswerable

Question: How much debt did SBC Communications have?
Answer: Unanswerable

Question: Who sold Comcast Cellular to Comcast?
Answer: Unanswerable