| http://www.w3.org/ns/prov#value | - and it shall be the duty of Congress to make such laws as will effectually prevent the immigration or importation into the United States of persons held to service or labor for lifej or for a period of years, or of ' any per so i intended to be sold in any Sute or place withia tha United Slates, under any pretense whatever. ; Sec 4.
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