Korrespondenz mit Rainer Maria Rilke

You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10.

# Requirements
- If you don't know the subject at all, return an empty list.
- If the subject is not a named entity, return an empty list.
- Include at least one triple where predicate is "instanceOf".
- Do not get too wordy.
- Separate several objects into multiple triples with one object.

Subject: Korrespondenz mit Rainer Maria Rilke
Description of subject: "Korrespondenz mit Rainer Maria Rilke" is a published collection of letters exchanged between Austrian writer Hugo von Hofmannsthal and poet Rainer Maria Rilke, offering insight into their literary ideas and personal relationship.