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 length 180-250 words total across 3-4 paragraphs, each paragraph 45-65 words, separated by \n\n in JSON string. Must include bold formatting with double asterisks for 3-5 key details across entire summary, not per paragraph. Must end with concrete statement, not forward-looking platitude. Must not use banned vocabulary etc. Must be human-like, active voice, varied sentence starters, etc.

We must ensure JSON is valid, no extra text. Provide fields exactly as required.

We need to extract primary_keyword (single most important 2-3 word phrase). Likely "Samsung Messages shutdown". That's 2 words? Actually "Samsung Messages" is 2 words, but maybe "Samsung Messages shutdown" is 3 words. Choose "Samsung Messages shutdown". Secondary_keywords: maybe "Galaxy phone", "Google Messages", "Android 11", "Samsung shutdown". Need 3-5.

content_type: likely "news" (breaking/timely). Could be "news". Provide.

key_entities: companies: list only companies mentioned: Samsung, Google, maybe Android Central? Companies: Samsung, Google. Possibly "Android Central" is a publication, not a company? It's a site. Could include "Samsung". Also "Google". Provide arrays.

people: maybe "Sanuj Bhatia"? Actually author is Sanuj Bhatia? The source mentions Sanuj Bhatia as writer. Also Derrek Lee? The image credit mentions Derrek Lee / Android Central. The author of article is Sanuj Bhatia. So people: "Sanuj Bhatia" maybe also "Derrek Lee"? He is photographer, not author. The article mentions "Sanuj is a tech writer". So include "Sanuj Bhatia". Also maybe "Derrek Lee" is photographer, but not a person mentioned in text? It's mentioned as image credit. Could include but it's a name. The instruction: only people mentioned in source. So include "Sanuj Bhatia". Also "Derrek Lee"? It's mentioned as image credit, but it's a perso