Find all the 800 phone numbers from a document
Find all the @enron.com email addresses in a document
Find all of the email addresses with a .edu from any domain in a document
Find all of the prices in a given document $100.99, $22, $1,234, $1,234.00, or $1,234,567.89
Find all of the valid .html file names listed in a document
Find the bedroom and bathrooms listed in a document. 4/2.5 or 4 / 2.5 (maybe more of a scraping thing than regex thing)
Given a corpus, extract all of the email addresses and write them to a csv file