To unpack the ART Corpus
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For linux + mac users:

* Download the ART_Corpus.tar.gz file and save it to a local folder (e.g. /Users/myhome/art_corpus)
* Open a terminal window and navigate to the art_corpus directory (by typing "cd /Users/myhome/art_corpus")
* Type the command: gunzip ART_Corpus.tar.gz
* And then: tar -xvf ART_Corpus.tar
The last two commands can also be replaces by:
* tar -xvfz ART_Corpus.tar.gz
This should create the ART_Corpus folder and its subfolders

For windows users:

* Download the ART_Corpus.tar.gz file and save it to a local folder (e.g. C:art_corpus)
* Download the open source 7-zip utility available from http://www.7-zip.org/
* To use 7-zip to unpack the corpus, follow the simple instructions at:
http://www.simplehelp.net/2007/06/22/how-to-open-rar-arj-gz-tar-and-rpm-files-in-windows/