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The grocery chains got a little iffy about all that somewhat negative media coverage, some of which was spurred by my continued analyses.

They started to put out these things in the store. It basically says "We've already lowered the prices of 450 products for you this year". With a sortiment of 22000.

They were also dumb enough to put out a machine readable PDF with all the products they lowered the price for.

With a little data science magic, I was able to match those with my database...