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a) Get from Wikipedia a list of persons categorised in a certain way eg. Movie stars born in Iowa;
b) compare that list with an integer taken from their entry in imdb eg. Number of films they have appeared in;
c) put them in a table listed by order of that integer eg. movie stars born in Iowa sorted by number of films they appeared in.
d) Update the data daily.
Is this a task for mechanize? Someone must have done this already :D