The Sentence Diagram Generator visually represents the grammatical structure of the sentence "The poems had a message that the student understood." Here is the breakdown:

1. Main Clause: "The poems had a message"

   • Subject: "The poems"
   • Verb: "had"
   • Direct Object: "a message"

2. Relative Clause: "that the student understood"

   • Relative Pronoun: "that"
   • Subject: "the student"
   • Verb: "understood"

The diagram will show "The poems" connected to "had," which connects to "a message," with "that" branching off to the relative clause, linking to "the student" and "understood."