{
  "answer": "The options for positional encoding mentioned are learned positional embeddings and fixed positional encodings (specifically, using sine and cosine functions of different frequencies).",
  "start_page_num": 6,
  "start_line_num": 31,
  "end_page_num": 6,
  "end_line_num": 32,
  "confidence": 0.98,
  "justification": "Lines 31–32 explicitly state: 'There are many choices of positional encodings, learned and fixed [9].' Additionally, further lines detail the sinusoidal encoding as the fixed choice, and Table 3 row (E) discusses using learned embeddings instead.",
  "quotes": [
    "There are many choices of positional encodings, learned and fixed [9]."
  ],
  "caveats": [
    "Further details about the specific implementation of learned embeddings are only touched on elsewhere, but both options are mentioned here."
  ],
  "complete_answer_found": true,
  "context_structured": true,
  "llm_discovered_keywords": [
    "learned positional embeddings",
    "fixed positional encodings",
    "sinusoidal positional encoding"
  ]
}