Question. Context: "Red Sails in the Sunset" is a popular song. Published in 1935, its music was written by Hugh Williams (pseudonym for Wilhelm Grosz) with lyrics by prolific songwriter Jimmy Kennedy. The song was inspired by the "red sails" of Kitty of Coleraine, a yacht Kennedy often saw off the northern coast of Ireland and by his adopted town Portstewart, a seaside resort in County Londonderry.

Question: who wrote the song red sails in the sunset?
Answer. music was written by Hugh Williams ( pseudonym for Wilhelm Grosz ) with lyrics by prolific songwriter Jimmy Kennedy
What step-by-step reasoning justifies that answer?
Reasoning: To answer this question, we should know that: Published in 1935, its music was written by Hugh Williams (pseudonym for Wilhelm Grosz) with lyrics by prolific songwriter Jimmy Kennedy.