Triple

Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).

Phrase: Gadsden Purchase agreement | Statement: [U.S.–Mexico border, governedBy, Gadsden Purchase agreement]

Target entity: Gadsden Purchase agreement
Context triple: [U.S.–Mexico border, governedBy, Gadsden Purchase agreement]

• A. Alaska Purchase
  The Alaska Purchase was the 1867 transaction in which the United States bought the Alaska territory from the Russian Empire, significantly expanding U.S. land holdings in North America.
• B. Louisiana Purchase
  The Louisiana Purchase was an 1803 land deal in which the United States bought a vast territory from France, doubling the nation's size and securing control of the Mississippi River region.
• C. Treaties of Velasco
  The Treaties of Velasco were 1836 agreements between the newly independent Republic of Texas and captured Mexican president Antonio López de Santa Anna that sought to end hostilities after the Battle of San Jacinto and define Texas–Mexico relations.
• D. Treaty of Ghent
  The Treaty of Ghent was the 1814 peace agreement between the United States and Great Britain that ended the War of 1812 and largely restored relations and territorial boundaries to their prewar status.
• E. Treaty of St. Louis (1804)
  The Treaty of St. Louis (1804) was an agreement in which Sauk and Meskwaki leaders, under disputed circumstances, ceded vast lands in Illinois and Missouri to the United States, later fueling tensions that led to the Black Hawk War.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"

Entity: Gadsden Purchase agreement
Triple: [U.S.–Mexico border, governedBy, Gadsden Purchase agreement]

The Gadsden Purchase agreement was an 1853 treaty between the United States and Mexico in which the U.S. bought a strip of land in present-day southern Arizona and New Mexico to facilitate a southern transcontinental railroad and finalize the continental border.

Target entity: Gadsden Purchase agreement
Target entity description: The Gadsden Purchase agreement was an 1853 treaty between the United States and Mexico in which the U.S. bought a strip of land in present-day southern Arizona and New Mexico to facilitate a southern transcontinental railroad and finalize the continental border.

• A. Alaska Purchase
  The Alaska Purchase was the 1867 transaction in which the United States bought the Alaska territory from the Russian Empire, significantly expanding U.S. land holdings in North America.
• B. Louisiana Purchase
  The Louisiana Purchase was an 1803 land deal in which the United States bought a vast territory from France, doubling the nation's size and securing control of the Mississippi River region.
• C. Treaties of Velasco
  The Treaties of Velasco were 1836 agreements between the newly independent Republic of Texas and captured Mexican president Antonio López de Santa Anna that sought to end hostilities after the Battle of San Jacinto and define Texas–Mexico relations.
• D. Treaty of Ghent
  The Treaty of Ghent was the 1814 peace agreement between the United States and Great Britain that ended the War of 1812 and largely restored relations and territorial boundaries to their prewar status.
• E. Treaty of St. Louis (1804)
  The Treaty of St. Louis (1804) was an agreement in which Sauk and Meskwaki leaders, under disputed circumstances, ceded vast lands in Illinois and Missouri to the United States, later fueling tensions that led to the Black Hawk War.
• F. None of above. chosen