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: Blue Spice provides Indian food in the less than £20 price range. It is located in the riverside.
Example Output: [['Blue Spice', 'food', 'Indian'], ['Blue Spice', 'priceRange', 'less than £20'], ['Blue Spice', 'area', 'riverside']]

Example Input: The Phoenix is a Chinese food restaurant, prices ranging from 20-25 dollars. The customer rating is high and it is located in center. city.
Example Output: [['The Phoenix', 'eatType', 'restaurant'], ['The Phoenix', 'food', 'Chinese'], ['The Phoenix', 'priceRange', '£20-25'], ['The Phoenix', 'customer rating', 'high']]

Example Input: Tennant discovered Osnium in 1803 from samples of South American platinum.
Example Output:
[['S. Tennant', 'OBSERVED_OR_PREDICTED', '1803'], ['Osmium', 'NOTES', 'Tennant had been working on samples of South American platinum in parallel with Wollaston and discovered two new elements, which he named osmium and iridium.'], ['Osmium', 'OBSERVER', 'S. Tennant']]