Complex sentence: The "Poetic Edda" is the modern attribution for an unnamed collection of Old Norse poems, while several versions exist all consist primarily of text from the Icelandic mediaeval manuscript known as the "Codex Regius".
Split into simpler sentences: The "Poetic Edda" is the modern attribution for an unnamed collection of Old Norse poems. While several versions exist, all consist primarily of text from the Icelandic mediaeval manuscript known as the "Codex Regius".