TV series example of the word

The Big Bang Theory Season 1, Episode 17
...is this subway, the transportation system, or Subway, the sandwich shop?
ভূগর্ভস্থ পথ
(1) An electric railway operating below the surface of the ground (usually in a city
(2) An underground tunnel or passage enabling pedestrians to cross a road or railway
(3) Electric underground railway
(1) As reported in the Daily Echo, he had earlier signed a petition calling for pedestrians to be provided with a bridge or a subway .
(2) They sat outside, near the subway station, eating and talking about the movie.
(3) I walked down the stairs of the subway station to get the train that would leave in a few minutes.
(4) All ten of us were present and accounted for as we went down into the subway station for our next ride.
(5) As regards to lighting, the path past the top of the old subway near the post office is still very dark.
(6) A subway station
(7) Building work is underway to fill in the subway at the foot of New Road and create three new pedestrian crossings.
(8) Nodes can belong to any of several networks the way a subway station can be a stop on any of several lines.
(9) She could see the light from the station up ahead and feel the subway car slowing to greet it.
(10) The BMTC terminus with a pedestrian subway for safety will also have shops and toilets.
(11) The subway and light railway can transport people to every corner of the city quickly.
(12) And even after two weeks there were still posters of her face up in the subway stations.
(13) With that, she headed straight to the subway station and paid a dollar for a ticket.
(14) The next thing I knew I was in a subway station walking in a line of a lot of people.
(15) Quite recently ten well-dressed men were fined two dollars each for spitting in one of the subway stations.
(16) The new dream is being shaped by a growing transit network of light-rail lines, subways , commuter rail and buses running in dedicated lanes.
(17) The multi-unit Viennese trams, buses and subways operate on the honor system.
(18) The project will include four subways for the heavy pedestrian traffic to cross at Bommanahalli, Garvebhavipalya, Kudlu and Singasandra junctions.
(19) Zebra crossings, pedestrian subways , overbridges and pedestrian signals are the best places to cross the road.
(20) Not their fault really but with no subways or overbridges for pedestrians they have no choice but to risk life and limb and walk across the road obstructing traffic in the process.
underground (rail system)
underground
underpass
The Big Bang Theory Season 1, Episode 17
...is this subway, the transportation system, or Subway, the sandwich shop?