A fill-in-the-blank sentence appears when you use a template in the Knowpar cards. They have a combination of text and fields that can be completed by the user or anyone that they are collaborating with. When you switch to complete (preview) mode, the sentences appear in a paragraph layout, and any blanks have underlines while any filled-in values seamlessly appear as part of the paragraph, as shown in the example screenshots below.
Hint
You can make notes on the right side of any sentence row, and you can also make comment threads on any card or on any row within a card. Check out this article to learn more about comments!