Read this: On November 17, 1987, SCA acquired CBS Records, which hosted such acts as Michael Jackson, for US$2 billion. CBS Inc., now CBS Corporation, retained the rights to the CBS name for music recordings but granted Sony a temporary license to use the CBS name. CBS Corporation founded a new CBS Records in 2006, which is distributed by Sony through its RED subsidiary.

On what date did CBS Records acquire SCA?
What is the answer? (If it cannot be answered, return "unanswerable")
unanswerable