Conversation so far:
What was Richard III of England's culture like?
CANNOTANSWER.
What can you tell me about the section in culture?
Apart from Shakespeare, Richard appears in many other works of literature.
What was he in of Shakespeares?
Shakespeare's play Richard III.
What other plays was he in?
The Latin-language drama Richardus Tertius (first known performance in 1580) by Thomas Legge.

Question: What year was the play Richard the 3rd?
Self-contained rewrite: What year was the play Richard the 3rd by Shakespear?