We need to produce JSON with fields. Word count 180-250 total across 3-4 paragraphs. Paragraphs separated by double newline \n\n inside the summary string.

We need 3-4 paragraphs, each 45-65 words. Let's aim for 4 paragraphs, each about 55 words. Total words 4*55=220, within range.

We must bold 3-5 key details with . Identify key details: Samsung, Vascular Load removal, US, late July, Galaxy Watch9 and Watch Ultra 2, One UI 9 Watch, Blood pressure trend feature. Choose maybe Samsung, Vascular Load, late July, Galaxy Watch Ultra 2, Blood pressure trend**. That's 5 bolds. Ensure only 3-5 bolded terms across entire summary.

We need to bold only specific terms, not generic. So we can bold "Samsung", "Vascular Load", "late July", "Galaxy Watch Ultra 2", "Blood pressure trend". That's 5.

Now craft paragraphs.

Paragraph 1: Introduce Samsung removing Vascular Load from US smartwatches. Include Samsung bold. Count words.

Let's draft: "Samsung is removing the Vascular Load feature from its US‑based smartwatches as part of a software update." That's maybe 18 words. Need 45-65 words total paragraph, so need more content.

Let's write full paragraph: "Samsung is removing the Vascular Load feature from its US‑based smartwatches as part of a software update. The change will take effect when Samsung Health version 7.0 and One UI 9 Watch roll out late July, affecting current Galaxy devices while preparing them for the upcoming Galaxy Watch Ultra 2 and Galaxy Watch9." Let's count words.

Count: Samsung(1) is2 removing3 the4 Vascular5 Load6 feature7 from8 its9 US‑based10 smartwatches11 as12 part13 of14 a15 software16 update17. The18 change19 will20 take21 effect22 when23 Samsung24 Health25 version26 7.027 and28 One29 UI30 931 Watch32 roll33 out34 late35 July,36 affecting37 current38 Galaxy39 devices40 while41 preparing42 them43 for44 the45 upcoming46 Galaxy47 Watch48 Ultra49 250 and51 Galaxy52 Watch953.

That's 53 words