This task is about using the specified sentence and converting the sentence to Resource Description Framework (RDF) triplets of the form (subject, predicate object). The RDF triplets generated must be such that the triplets accurately capture the structure and semantics of the input sentence. The input is a sentence and the output is a list of triplets of the form [subject, predicate, object] that capture the relationships present in the sentence. When a sentence has more than 1 RDF triplet possible, the output must contain all of them.

Example Input: "blood relations" was directed by Nelson McCormick.
Example Output: [['blood relations', 'DIRECTED_BY', 'nelson mccormick']]

Example Input: In 1927, Helen Moody and Elizabeth Ryan secured first place in the Wimbledon while Irene Peacock and Bobbie Heine won the French Open.
Example Output: [['1927', 'WIMBLEDON', 'Helen Wills Moody (5/9)  Elizabeth Ryan (10/17)'], ['1927', 'FRENCH_OPEN', 'Irene Bowder Peacock  Bobbie Heine']]

Example Input: The name of the vacator for district Louisiana 1st is Richard A. Tonry (D).
Example Output:
[['Louisiana 1st', 'VACATOR', 'Richard A. Tonry (D)']]