4021
The station was originally built as the terminus of the Birmingham and Gloucester Railway in 1840 but the arrival of the ( broad gauge ) Bristol and Gloucester Railway and Cheltenham and Great  Western Union  Railway in 1844 and then conversion to a through station for the South Wales Railway in  1851  resulted in a very complex layout .
 None
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
Answer:
 NA: Western Union, 1851