Block · one region of the page, as the scanner read it. It may hold a whole story, part of one, several, or an advertisement; stitching blocks into articles is the next step. Text is supplied OCR.
Page 3 · column 4 of 5 · from the scan, no model involved

furnace filters
A Contains more filterina
, materials than most
standard filters. ActtVivJ ft_ 10x20x1 12x24x1 15x20x1 14x20x1 14x25x1 16x20x1 16x25x1 20x20x1 20x25x1
73.2%