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.

The World's population was 4.4 billion in 1980.
[['World', '1980', '4,434,682,000']]

The Riverside Academy in Riverside has PreK to grade 4 only.
[['Riverside Academy', 'HIGH_GRADE', '4'], ['Riverside Academy', 'NEIGHBORHOOD', 'Riverside'], ['Riverside Academy', 'LOW_GRADE', 'PreK']]

Auburn, Washington is in the U.S.

[['Auburn, Washington', 'COUNTRY', 'United States']]