The Sentence Diagram Generator allows users to visually represent the grammatical structure of sentences, including complex constructs. To diagram the sentence "Include a biography at the end of your research paper," you would follow these steps:

1. Identify the main verb ("include") and subject (implied "you").
2. Diagram the direct object ("a biography") and its modifiers.
3. Include the prepositional phrase ("at the end of your research paper") and its components.

This visual representation will clarify the relationships between the sentence elements, aiding in understanding and analysis.