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."?
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.