Sure! Here are the 5 W's for the 18th Amendment:
Who: The United States Congress (in a broader sense, it applies to all U.S. citizens).
What: The 18th Amendment establishes the prohibition of intoxicating liquors.
When: Ratified on January 16, 1919, and went into effect on January 17, 1920.
Where: United States (applicable across the entire country).
Why: To promote social morals and public health by eliminating the consumption of alcohol, which was believed to cause societal issues such as crime and corruption.