A literate song from a hyper-literate group is the focus of this week’s Lyrics Undercover. The Decemberists, a group not easily categorized, hail from Portland. Their first album on a major label was “The Crane Wife,” released in 2006. Today we look at the album’s lead song, “The Crane Wife Part 3,” which grew from a Japanese folktale. (This is the monthly free episode of Lyrics Undercover, which is included in the Coverville feed. To subscribe, visit LyricsUndercover.com)