how to parse html in iphone app [closed]

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i am doing an iphone app,

there are sample project in this web http://developer.apple开发者_开发知识库.com/library/ios/#samplecode/XMLPerformance/Listings/ReadMe_txt.html

how to change this sample project to get " A few years ago " in this web code:(http://www.ted.com/talks/matt_cutts_try_something_new_for_30_days.html)

???

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Have a look at Hpple, it's a nice HTML parser using XPath queries, which are really easy to learn.