Complex sentence: Having been granted permission to sample any Jimi Hendrix song they wished, they released the song "If 60's Were 90's", which was originally released in 1992 in just the UK, an album with the same name was released.
Split into simpler sentences: Having been granted permission to sample any Jimi Hendrix song they wished, they released If 60's Were 90's. Originally released in 1992 in just the UK, an album with the same name was released.