Unix Script (Very URGENT)

I need to create a script shell to select some information from a XML source file, and I do not how to do it!!>

This is the XML source file:

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I need to select just part of the information, Example:

From the section 1, I need to get first last from label ContactName and company from the label CompanyName or can be anyone from the section 1.

Same case for the section 2

Thank you for your help

Best Regards

Aurelio Vazquez Alejo
avazquez65@yahoo.com