I need to ensure the JSON structure is correct, with only the necessary keys and proper formatting. No markdown, just raw JSON inside a code block. Also, ensure that the paragraphs are within the content array, followed by the chart, then the analysis paragraph. Wait, the user's example JSON includes a paragraph, then a chart, then another paragraph. But the user's instructions say to include exactly one chart item inside "content". Let me check the example again. The example shows a content array with a paragraph, then a chart, then another paragraph. However, the user's instructions state that the Market Overview must have exactly ONE chart item. Wait, no. The user says "You MUST include exactly ONE chart item inside 'content'." So the structure is: [paragraph, chart, paragraph]. But the user's example shows a paragraph, then a chart, then analysis text. So in the JSON, the content array includes three elements: first paragraph, then chart, then analysis paragraph. However, in the user's strict output contract, they mentioned including exactly one chart item. So the chart should be in the content array. The user's example structure is correct.