We need to output valid JSON with fields: seo_title, summary, key_entities, expert_faq, internal_link_anchor, primary_keyword, secondary_keywords, content_type.

Also need to include the summary text (3-4 paragraphs, 45-65 words each, total 180-250 words). Must bold 3-5 key details across entire summary using double asterisks. Must not bold generic words. Must not use banned vocabulary etc. Must avoid filler etc. Must not use banned phrases. Must ensure no banned words like "additionally", etc. Must avoid "key" (banned). The banned vocabulary includes "key". So cannot use the word "key". Must be careful. Also "primary" etc are fine but not "key". The banned list includes "key". So we cannot use the word "key" anywhere in the output. That includes "key_entities"? That's part of JSON field names; but the instruction says "BANNED VOCABULARY — never use these words/phrases: ... key". That likely applies to the generated text, not JSON field names? But the output includes "key_entities". That contains the word "key". That might violate the rule. However the instruction says "BANNED VOCABULARY — never use these words/phrases: ... key". That probably means in the generated content, not JSON keys? But the JSON includes "key_entities". That might be considered part of output text, but it's a field name, not user-visible? The instruction is ambiguous. However the system says "Return valid JSON only." So we must output JSON with those field names. The banned vocabulary likely refers to content inside the JSON values, not the field names themselves. But "key_entities" contains the word "key". That might be considered a violation. But we cannot change field names because they are required. The instruction says "key_entities" is part of output format. So we must include that field name exactly. The banned word rule probably applies to the content we write, not the JSON structure. So it's okay.

We must ensure the summary has exactly 3-4 paragraphs, each 45-65 words, total 180