Instruct: Classify a given review into positive or negative sentiment.
Query: Wilco's sound continues to evolve

Much like "Yankee Hotel Foxtrot", "A Ghost Is Born" contains catchy tunes like "The Late Greats" and "Theologians" as well as songs that take a few plays before they begin to grow on the listener. Of the twang that once pervaded Wilco's music, only the barest hints are present. And (just as in YHF) certain tracks seem designed to challenge the listener's patience, as when the enjoyable "Handshake Drugs" ends in two minutes of dissonance. However, the lyrics are almost as downtrodden as those of 1999's "Summerteeth". Even the album's most whimsical and upbeat song, "The Late Greats", ends with a sad hint at greatness and joy left unfulfilled. Tweedy's musical and poetic skills have reached a new high point with this release, even as his new material covers the same old themes of emptiness and frustration.