| http://www.w3.org/ns/prov#value | - There are such things as 'contracts', e.g. we pay for your education, and you agree to work for us for a minimum of 3 years (or maybe 5 years) after graduation, or else reimburse the company on a pro-rated basis for the educational benefit (so if your school bills were 25,000, and you agreed to work 5 years, but quit after 2, you would owe them 15,000).
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