Amy and I are going to see Paul McCartney next Friday in Des Moines! Needless to say, we are both very excited. Paul McCartney is a legendary songwriter! I found this article last night, and I had to share it with you guys! There's a video with an excellent walk-through of Penny Lane's chord structure.
http://www.culturesonar.com/penny-lane/
Until next time!
-T.