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 21 · column 2 of 5 · from the scan, no model involved

From the fetal monitor, the wide tape shows the heartbeat of two infants, and the narrow tape records the mother's contractions.
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