Complex sentence: The song while originally credited as composed by Brian Wilson, is a direct copy of Chuck Berry's Sweet Little Sixteen the threat of a lawsuit officially gave Berry sole writing credit (both lyrics and music) for the song.
Split into simpler sentences: The song while originally credited as composed by Brian Wilson, is a direct copy of Chuck Berry's Sweet Little Sixteen. The threat of a lawsuit officially gave Berry sole writing credit (both lyrics and music) for the song.