Irene Mayer Selznick

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: Irene Mayer Selznick
Description of subject: Irene Mayer Selznick was an American theatrical producer and Hollywood socialite, known for producing the original Broadway production of "A Streetcar Named Desire" and for being the daughter of MGM co-founder Louis B. Mayer.