Categorize the following song as either rock, folk, or classical.
Song: "Für Elise" by Ludwig van Beethoven
The song "Für Elise" by Ludwig van Beethoven is categorized as classical.
Complete the following task based on the instruction and optional input provided.### Instruction:
Categorize the following song as either rock, folk, or classical.

### Input:
Song: "Für Elise" by Ludwig van Beethoven

### Output:
The song "Für Elise" by Ludwig van Beethoven is categorized as classical.