You can read this in the PDF:
"Send me the last word of the message along with the name of a character that had spoken the original quote, separate the two words by a comma."
The format of solution is defined quit unambiguously.
The only information that is missing is that it should be written in uppercase, but it should be taken as a matter of course, if there is not written to use different format of letters.
Another help, if it is not clear what is meant by the word "character":
Question: Who is the author of the quote: "To be, or not to be, that is the question."?
Answer: William Shakespeare
Question: What is the name of a character that said: "To be, or not to be, that is the question."?
Answer: Hamlet
Of course it may be that many other people (characters) had spoken the same quote, but they only repeated the original.
So when you are answering such a question you should always provide a person (character) that had spoken it first.
And additional hint:
The name of the character may not be as obvious as someone might think at first.