Question: The last surviving remnant of one of the original Brooklyn elevated railroads can be seen in a line that was opened what day ?

text: List of New York City Subway stations in Brooklyn
Lines and services

The New York City Subway is a rapid transit system that serves four of the five boroughs of New York City in the U.S. state of New York: the Bronx, Brooklyn, Manhattan, and Queens. Operated by the New York City Transit Authority under the Metropolitan Transportation Authority of New York, the New York City Subway is the busiest rapid transit system in the United States and the seventh busiest in the world, with 5.225 million daily riders. The system's 472 stations qualifies it to have the largest number of rapid transit stations in the world. Three rapid transit companies merged in 1940 to create the present New York City Subway system: the Interborough Rapid Transit Company (IRT), the Brooklyn-Manhattan Transit Corporation (BMT), and the Independent Subway System (IND). All three former systems are present in Brooklyn.
Division Line Services Stations in Brooklyn Opened Continues to
B ( BMT ) 04 Fourth Avenue Line D N R ​ ​ ​ 16 ( 3 express-local stations , 4 part of station complexes , 1 shared with Brighton Line ) June 22 , 1915 Manhattan
B ( IND ) 06 Sixth Avenue Line F ​ 0 1 April 9 , 1936 Manhattan
B ( IND ) 08 Eighth Avenue Line A C ​ 0 1 February 1 , 1933 Manhattan
B ( BMT ) Brighton Line B Q ​ 20 ( 6 express-local stations ( 1 shared with Franklin Avenue Line ) , 1 part of a station complex , 1 shared with Fourth Avenue Line , 1 shared with Culver Line , 1 shared with Culver , Sea Beach , and West End Lines ) July 2 , 1878 Manhattan
A ( IRT ) Broadway-Seventh Avenue Line 2 3 ​ 0 2 ( 1 part of a station complex ) April 15 , 1919 Manhattan
B ( BMT ) Canarsie Line L 19 ( 3 part of station complexes ) July 28 , 1906 Manhattan
B ( IND ) Crosstown Line G 11 ( 1 part of a station complex , 1 shared with Fulton Street Line ) August 19 , 1933 Queens
B ( IND ) Culver Line F G ​ 21 ( 2 part of station complexes , 1 shared with Fulton Street Line , 1 shared with Brighton Line , 1 shared with Brighton , Sea Beach & West End Lines ) March 16 , 1919 N/A
A ( IRT ) Eastern Parkway Line 2 3 4 5 ​ ​ ​ 11 ( 4 express-local stations , 3 part of station complexes ) January 9 , 1908 Manhattan
B ( BMT ) Franklin Avenue Line S 0 4 ( 2 part of station complexes , 1 shared with Brighton Line ) August 18 , 1878 N/A
B ( IND ) Fulton Street Line A C ​ 16 ( 5 express-local stations , 3 part of station complexes , 1 shared with Culver Line , 1 shared with Crosstown Line ) April 9 , 1936 Queens
B ( BMT ) Jamaica Line J M Z ​ 16 ( 4 express-local stations , 1 part of a station complex ) June 25 , 1888 Manhattan , Queens
B ( BMT ) Myrtle Avenue Line M 0 3 ( 1 part of a station complex ) April 10 , 1888 Queens
A ( IRT ) New Lots Line 3 4 ​ ​ ​ 0 7 November 22 , 1920 N/A
A ( IRT ) Nostrand Avenue Line 2 5 ​ 0 7 August 23 , 1920 N/A
B ( BMT ) Sea Beach Line N ​ 10 ( 1 part of a station complex , 1 shared with Brighton , Culver & West End Lines ) June 22 , 1915 N/A
B ( BMT ) West End Line D 13 ( 1 part of a station complex , 1 shared with Brighton , Culver & Sea Beach Lines ) June 24 , 1916 N/A