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

Constraints:

- Summary 180-250 words total across 3-4 paragraphs, each 45-65 words. So 3 paragraphs of ~60 words = 180 words; 4 paragraphs of ~55 = 220. Must be within 180-250. Let's aim for 4 paragraphs of ~55 words = 220 words.

- Must bold 3-5 key details across entire summary using double asterisks. Not per paragraph. So maybe bold: Anglian Water, £2.5bn, £104bn, Ofwat, National Audit Office (that's 5). But need to be selective. Choose 4 maybe.

- Must not use banned vocabulary. Avoid words like "crucial", "highlight", "underscore", etc. Avoid filler phrases.

- Must end with concrete statement, not forward-looking platitude.

- Must not invent facts. Use only source.

- Must output valid JSON only, no markdown.

- Must ensure JSON string includes newline characters \n\n for paragraph separation.

- Word count: need to count words. Let's draft paragraphs.

Paragraph 1 (~55 words): "Four of the 16 privatised water and sewage companies in England and Wales — Anglian Water, Northumbrian Water, South Staffordshire Water and Wessex Water — spent less than their regulatory allowances between 2010 and 2025, according to Ofwat data obtained by the FT under a Freedom of Information request."

Count words: Let's count. "Four(1) of2 the3 164 privatised5 water6 and7 sewage8 companies9 in10 England11 and12 Wales13 —14 Anglian15 Water,16 Northumbrian17 Water,18 South19 Staffordshire20 Water21 and22 Wessex23 Water24 —25 spent26 less27 than28 their29 regulatory30 allowances31 between32 201033 and34 2025,35 according36 to37 Ofwat38 data39 obtained40 by41 the42 FT43 under44 a45 Freedom46 of47 Information48 request49." That's 49 words. Need 45-65, okay.

Paragraph 2 (~55 words): "Five other firms missed their targets in at least one five‑year period, while the industry argued low bills constrain