how to store ONLY the 8th column of this txt file

I would like to know the most elegant way to store only the 8th line of this this text file.

I am trying to make a program that will determine when to turn on a sprinkler system...it will look at the data for the past two days and determine if it should turn on the sprinklers...

The data looks like this...:

http://www.erh.noaa.gov/er/iln/climo/cvgjan13
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