In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.
Q: Passage: The original Enfield Station in Windmill Hill opened on 1 April 1871 as the terminus for the Great Northern Railway branch line from Alexandra Palace. By 1887, 37 trains a day left Enfield, mainly for King's Cross, but also to Broad Street and until 1907, to Woolwich and Victoria. The station building was a two-storey twin-gabled house, similar in style to the single-storey building at Palmers Green. It was sited lengthways across the end of the track. The single island platform was covered by a wide canopy for much of its length. Enfield Station had been intended to bring prosperous middle-class commuters to the area. A journalist visiting the station in 1885, saw a sign advertising cheap workmen's tickets for trains scheduled to arrive in London before 8 am, only to find that the timetable showed that there were no trains that met that criterion. The old Enfield Station closed to passengers in 1910 and was replaced by the present station, but remained in use as a goods depot until 1974. The surviving buildings were demolished and replaced in the 2000s with housing along a new street, Gladbeck Way.
 Link Information: On 1 March 1848 the first portion of the Great Northern Railway was opened Answer: 23
A: 
How many years after the initial construction of the Great Northern Railway was Enfield Station built?