Bad PDF quality of older articles

I'm sure this is low-priority, but I wanted to make the suggestion anyway: Many older articles in the anthology are extremely hard to read due to the low quality of the pdfs (presumably created by scanning printed papers...?) Maybe some software could at some point be run on those articles to make them more readable.

An example is [C94-2122](http://aclweb.org/anthology/C94-2122). Here's a screenshot for illustration, taken from the 4th page.