Complex sentence: In 2012, she was an honoree of the Country Music Hall of Fame and Museum's "Poets and Prophets" series which honors songwriters deemed to have made a significant contribution to country music.
Split into simpler sentences: In 2012, she was an honoree of the Country Music Hall of Fame and Museum's "Poets and Prophets" series. The program is to honor songwriters deemed to have made a significant contribution to country music.