<hi xmlns="http://www.tei-c.org/ns/1.0" style="font-size:11pt">Layout analysis proved to be a critical step, as job-ads pages often have irregular layouts due to space-saving practices, decorative frames, or rotated content. Therefore, segmentation algorithms tended to separate headings from ad text, or to merge multiple ads. To quantify this problem, we manually annotated almost 15,000 job advertisements across all our newspapers and years. This ground-truth dataset was published in the CHR2024 conference paper (Venglarova, Adam, Mölzer, et al. 2024). </hi>