These bold paragraphs are pullquotes in the original page. From the rules:

"Pullquotes must be horizontally centered on IV page if pull quotes exist in the source"

Tags have to be removed

Marked paragraph is supposed to be a blockquote

The block in the end should be formatted differently (for example as a blockquote), while the quotes in the middle of the text are actually pull-quotes (not blockquotes) and should be centered. From the rules:

"Pullquotes must be horizontally centered on IV page if pull quotes exist in the source"

Compare the definitions (from Wikipedia):

- A pull quote (also known as a lift-out pull quote) is a key phrase, quotation, or excerpt that has been pulled from an article and used as a graphic element, serving to entice readers into the article or to highlight a key topic. It is typically placed in a larger or distinctive typeface and on the same page.

- A block quotation is a quotation in a written document that is set off from the main text as a paragraph, or block of text, and typically distinguished visually using indentation and a different typeface or smaller size font.

Missing author name.