{
  "answer": "Aluminum prices are projected to rise by about 22 percent in 2026 (y/y) to reach an all-time high—about 21 percent higher than their January 2026 projections—supported by tight supply conditions and solid demand growth. Prices are expected to decline by about 6 percent in 2027 as supply conditions gradually ease.",
  "start_page_num": 45,
  "start_line_num": 32,
  "end_page_num": 45,
  "end_line_num": 43,
  "confidence": 0.98,
  "justification": "The selected span explicitly provides the projected percentage increase for aluminum prices in 2026, the context for these movements, and the outlook for 2027. It also mentions the record-high level forecast and factors driving the price.",
  "quotes": [
    "Aluminum prices are projected to rise by about 22 percent in 2026 (y/y) to reach an all-time high—about 21 percent higher than their January 2026 projections—supported by tight supply conditions and solid demand growth (table 1).",
    "Prices are expected to decline by about 6 percent in 2027 as supply conditions gradually ease."
  ],
  "caveats": [],
  "complete_answer_found": true,
  "context_structured": true,
  "llm_discovered_keywords": [
    "all-time high",
    "tight supply conditions",
    "solid demand growth"
  ]
}