We need to produce JSON with fields: seo_title, summary, key_entities (companies, people, locations), expert_faq (question, answer), internal_link_anchor, primary_keyword, secondary_keywords, content_type.

We must write a summary of 180-250 words, split into 3-4 paragraphs separated by \n\n. Each paragraph 45-65 words. Need to bold a few key details using double asterisks, 3-5 total across summary.

We must only use info from source. Source says: Samsung removes Vascular Load from its smartwatches in the US. It will be gone when Samsung Health version 7.0 and One UI 9 Watch roll out "in late July". Galaxy Watch9 and Galaxy Watch Ultra 2, rumored to be unveiled on July 22, will come with One UI 9 Watch pre-installed. Older devices should then be updated gradually. Once Vascular Load is deactivated, the data won't appear in Samsung Health, but you can download it at any time by going to More options > Settings > Download personal data. Samsung is replacing Vascular Load with a new feature called Blood pressure trend, which will be available on "the upcoming Galaxy Watch", the company says. This will check your blood pressure periodically to show you a trend over time. It will also give you tips to "support healthy habits". Before you start tracking your Blood pressure trend, you'll need to use a blood pressure cuff to set up your Galaxy Watch.

We need to bold key details: maybe Samsung, Vascular Load, Blood pressure trend, Galaxy Watch9, Galaxy Watch Ultra 2, maybe July 22, late July. But only 3-5 total across entire summary. Choose maybe: Samsung, Vascular Load, Blood pressure trend, Galaxy Watch9, Galaxy Watch Ultra 2. That's 5. Ensure we don't bold generic words. Good.

Now need to write 3-4 paragraphs, each 45-65 words, total 180-250 words. Let's aim for 3 paragraphs of about 60-70 words each => ~180-210 words. But each paragraph must be 45-65 words. Let's target ~55 words per paragraph => 165 words, need at le