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 12th rank is Semi-Tough from studio United Artists with the gross amount $37,187,139.
[['Semi-Tough', 'RANK', '12.'], ['Semi-Tough', 'STUDIO', 'United Artists'], ['12.', 'GROSS', '$37,187,139']]

The Phoenix is a cheap, five star restaurant by the river.
[['The Phoenix', 'eatType', 'restaurant'], ['The Phoenix', 'priceRange', 'cheap'], ['The Phoenix', 'customer rating', '5 out of 5'], ['The Phoenix', 'area', 'riverside']]

Elliot See's Alma mater was the University of Texas , Austin, he had affiliations with the University of Texas System. He died in St. Louis on February 28, 1966.

[['Elliot See', 'ALMA_MATER', 'University of Texas at Austin'], ['University of Texas at Austin', 'AFFILIATIONS', 'University of Texas System'], ['Elliot See', 'DEATH_PLACE', 'St. Louis'], ['Elliot See', 'DATE_OF_DEATH', '"1966-02-28"']]