基本的iTunes AppleScript问题

Question

[感觉就像是一个真正的骨头，只是试图弄清楚如何使此脚本将艺术家中所选内容的名称插入并将其放入专辑艺术家中。

tell application "iTunes"
  set theTracks to (item 1 of (get selection))
  set theTracks to selection
  repeat with theTrack in theTracks
    set albumartist to artist of theTrack
  end repeat
end tell