Complex sentence: "Three O'clock in the Morning" was published in the United States in 1919, and when it was recorded by Paul Whiteman in 1922 it became one of the first 20 recordings in history to achieve sales of over one million records.
Split into simpler sentences: Three O'clock in the Morning was published in the United States in 1919. The song was recorded by Paul Whiteman in 1922 and became one of the first 20 recordings in history to achieve sales of over one million records.