Context: The United States Postal Service (USPS), (also known as the Post Office, U.S. Mail, or Postal Service), is an independent agency of the United States government responsible for providing postal service in the United States. It is one of the few government agencies explicitly authorized by the United States Constitution., The United States Congress is the bicameral legislature of the federal government of the United States consisting of two chambers: the Senate and the House of Representatives. The Congress meets in the Capitol in Washington, D.C. Both senators and representatives are chosen through direct election, though vacancies in the Senate may be filled by a gubernatorial appointment. Members are usually affiliated to the Republican Party or to the Democratic Party, and only rarely to a third party or as independents. Congress has 535 voting members: 435 Representatives and 100 Senators. The House of Representatives has six non-voting members in addition to its 435 voting members. These members can, however, sit on congressional committees and introduce legislation. These members represent Washington, D.C., Puerto Rico, American Samoa, Guam, the Northern Mariana Islands and the U.S. Virgin Islands., Richard Milhous Nixon (January 9, 1913  April 22, 1994) was an American politician who served as the 37th President of the United States from 1969 until 1974, when he became the only U.S. president to resign from office. He had previously served as a U.S. Representative and Senator from California and as the 36th Vice President of the United States from 1953 to 1961 under the presidency of Dwight D. Eisenhower., A corporation is a company or group of people authorized to act as a single entity (legally a person) and recognized as such in law. Early incorporated entities were established by charter (i.e. by an "ad hoc" act granted by a monarch or passed by a parliament or legislature). Most jurisdictions now allow the creation of new corporations through registration., The Post Office Department (17921971) was the predecessor of the United States Postal Service, in the form of a Cabinet department officially from 1872 to 1971. It was headed by the Postmaster General., The Postal Reorganization Act of 1970 was a law passed by the United States Congress that abolished the then United States Post Office Department, which was a part of the cabinet, and created the United States Postal Service, a corporation-like independent agency with an official monopoly on the delivery of mail in the United States. was signed into law by President Richard Nixon on August 12, 1970., The United States Postal Regulatory Commission ( or PRC ) , formerly called the Postal Rate Commission , is an independent regulatory agency created by the Postal Reorganization Act of 1970 . Like the Postal Service , it was defined in law as an independent establishment of the executive branch ., The mail or post is a system for physically transporting documents and other small packages; or, the postcards, letters, and parcels themselves. A postal service can be private or public, though many governments place restrictions on private systems. Since the mid-19th century national postal systems have generally been established as government monopolies with a fee on the article prepaid. Proof of payment is often in the form of adhesive postage stamps, but postage meters are also used for bulk mailing. Modern private postal systems are typically distinguished from national postal agencies by the names "courier" or "delivery service"., Subject: postal regulatory commission, Relation: instance_of, Options: (A) addition (B) agency (C) april (D) century (E) charter (F) company (G) congress (H) constitution (I) corporation (J) courier (K) delivery (L) department (M) direct election (N) federal government (O) government (P) group (Q) house (R) independent agency of the united states government (S) january (T) law (U) legislation (V) mail (W) office (X) official (Y) parliament (Z) payment ([) politician (\) post office (]) public (^) representative (_) senator (`) service (a) single (b) united states congress
Output: independent agency of the united states government