Looking for a great punchline, for ""I'm so old"" joke setup. Joke starts like this: ""In my day, Chemistry Class was SO easy. There were only four elements! Earth, Wind, Fire, ........."" Looking for the name of a singer or band for the punchline. Possible choices so far: "" and The Temptations."" "" and Led Zeppelin."" "" and Iron Butterfly."" (does NOT need to contain any element-like name, but it could)