Complex sentence: In April 2009, George Strait was honored by the Academy of Country Music with the Artist of the Decade Award, which was presented to Strait by the previous ACM Artist of the Decade, Garth Brooks.
Split into simpler sentences: In April 2009, George Strait was honored by the Academy of Country Music with the Artist of the Decade Award. The artist of the decade award was presented to George Strait by the previous ACM Artist of the Decade Garth Brooks.