Classify the following sentence as a statement, command, exclamation or question: "Did you understand the question?"
The sentence "Did you understand the question?" is a question.
Complete the following task based on the instruction and optional input provided.### Instruction:
Classify the following sentence as a statement, command, exclamation or question: "Did you understand the question?"

### Output:
The sentence "Did you understand the question?" is a question.