question: What singer of "Harper Valley PTA" had a song covered by Hoodoo Gurus?
answer: Jeannie C. Riley
context: Title: Electric Chair (album)
  Passage: Electric Chair is a compilation album by Australian rock group Hoodoo Gurus.  It was originally released as a 2-CD set with "Armchair Gurus", the album features seventeen Hoodoo Gurus' rock/party tracks whilst "Armchair Gurus" contains seventeen ballads and slower songs.  The double set contains two tracks not previously found on Gurus' albums and five totally new songs including the single "The Real Deal".  The albums were also released as separate albums.  The album was certified gold.
  Title: The Generation Gap (song)
  Passage: "The Generation Gap" was a single by Australian rock group Hoodoo Gurus.  It was released on RCA Records in 1988 as a single-only release.  It was written by Charlie Craig, Betty Craig, Jim Hayner and was a cover of Jeannie C. Riley's 1970 country song.  The B-side, "Jungle Bells" was written by Dave Faulkner.
  Title: Jeannie C. Riley
  Passage: Jeannie C. Riley (born Jeanne Carolyn Stephenson, October 19, 1945) is an American country music and gospel singer.  She is best known for her 1968 country and pop hit "Harper Valley PTA" (written by Tom T. Hall), which missed (by one week) becoming the "Billboard" Country and Pop number one hit at the same time.  In subsequent years, she had moderate chart success with country music, but never again duplicated the success of "Harper Valley PTA".  She became a born-again Christian and began recording gospel music during the late 1970s.
citations: The Generation Gap (song) Jeannie C. Riley