Complex sentence: The phrase was first popularized by a group of Scottish skinheads called Glasgow Spy Kids, and its use in the title for a skinhead history book, Spirit Of 69-A Skinhead Bible, led skinheads to adopt it around the world.
Split into simpler sentences: The phrase was first popularized by a group of Scottish skinheads called Glasgow Spy Kids. Its use in the title of a skinhead history book, "Spirit Of 69-A Skinhead Bible", led skinheads to adopt it around the world.