Read this and answer the question. If the question is unanswerable, say "unanswerable".

Tennessee has played a critical role in the development of many forms of American popular music, including rock and roll, blues, country, and rockabilly.[not verified in body] Beale Street in Memphis is considered by many to be the birthplace of the blues, with musicians such as W.C. Handy performing in its clubs as early as 1909.[not verified in body] Memphis is also home to Sun Records, where musicians such as Elvis Presley, Johnny Cash, Carl Perkins, Jerry Lee Lewis, Roy Orbison, and Charlie Rich began their recording careers, and where rock and roll took shape in the 1950s.[not verified in body] The 1927 Victor recording sessions in Bristol generally mark the beginning of the country music genre and the rise of the Grand Ole Opry in the 1930s helped make Nashville the center of the country music recording industry.[not verified in body] Three brick-and-mortar museums recognize Tennessee's role in nurturing various forms of popular music: the Memphis Rock N' Soul Museum, the Country Music Hall of Fame and Museum in Nashville, and the International Rock-A-Billy Museum in Jackson. Moreover, the Rockabilly Hall of Fame, an online site recognizing the development of rockabilly in which Tennessee played a crucial role, is based in Nashville.[not verified in body]

In which year is W.C. Handy first known to have been playing in Tennessee clubs?
1909