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: Richland Township is in Madison County, Indiana, U.S.
Example Output: [['Richland Township, Madison County, Indiana', 'COUNTRY', 'United States']]

Example Input: Charles w. whalen, jr. (r) unopposed were the candidates in the districts that was first elected in 1966.
Example Output: [['Ohio 3', 'INCUMBENT', 'Charles W. Whalen, Jr.'], ['Charles W. Whalen, Jr.', 'FIRST_ELECTED', '1966'], ['Ohio 3', 'CANDIDATES', 'Charles W. Whalen, Jr. (R) Unopposed']]

Example Input: The 3rd most senior U.S. Representative in Congress was Democratic Party member Dave Obey.
Example Output:
[['Dave Obey', 'RANK', '3'], ['Dave Obey', 'PARTY', 'D'], ['[TABLECONTEXT]', '[TITLE]', 'List of United States Representatives in the 110th Congress by seniority'], ['[TABLECONTEXT]', 'REPRESENTATIVE', 'Dave Obey']]