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: Arros negre is from the region of Catalonia in Spain. The main ingredients are white rice, cuttlefish or squid, cephalopod ink, cubanelle peppers.
Example Output: [['Arròs negre', 'COUNTRY', 'Spain'], ['Arròs negre', 'MAIN_INGREDIENTS', '"White rice, cuttlefish or squid, cephalopod ink, cubanelle peppers"'], ['Arròs negre', 'REGION', 'Catalonia'], ['Arròs negre', 'INGREDIENT', 'Squid']]

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

Example Input: Spaniards are the ethnic group of Spain where the language is Spanish and where Ajoblanco is from.
Example Output:
[['Spain', 'LANGUAGE', 'Spanish language'], ['Ajoblanco', 'COUNTRY', 'Spain'], ['Spain', 'ETHNIC_GROUP', 'Spaniards']]