Yes- Long Distance Runaround

It's easy to make fun of the excesses of seventies prog-rock but it's also easy to forget what a giant and experimental step prog was from "Rock Around the Clock." In less than two decades, music was opened up in ways that were quite unimaginable in the mid-1950's and, in spite of several long stagnant periods, it's still expanding today. Here's one of my favorite seventies groups, YES, from 1975 with a lovely acoustic version of LONG DISTANCE RUNAROUND.