Answer the following question: Information:  - Historically a merchant city, Osaka has also been known as the and served as a center for the rice trade during the Edo period.  - Services. Along with services inside the line, through trains also operate to the Nankai Kya Line beyond Nakamozu to .  - There are two railway stations named Nakamozu (  Nakamozu - eki ) in Nakamozuch Nich , Kita - ku , Sakai , Osaka Prefecture , Japan . One is on the Nankai Koya Line and the Semboku Rapid Railway , and the other is on the Osaka Municipal Subway Midosuji Line . The name of the station is difficult to read in kanji , as well as Abiko Station and Namba Station on the Osaka Municipal Subway Midosuji Line . The subway station shows the name in hiragana (  ) for information , but uses kanji for the official station name . The Semboku Rapid Railway Line uses both kanji and hiragana (  ) on the destination signs at the stations and on the destination displays on the trains .  - The is a rapid transit line in Osaka, Japan, operated by the Osaka Municipal Subway. Constructed under Midsuji, a major north-south street, it is the oldest line in the Osaka subway system and the second oldest in Japan, following the Tokyo Metro Ginza Line. Its official name is , while the Osaka Municipal Transportation Bureau refers to it as , and in MLIT publications it is referred to as . On line maps, stations on the Midsuji Line are indicated with the letter M.  - Overview. The Midsuji Line is the main and busiest line in the whole subway network.  - The wards of Sakai were established when Sakai became a city designated by government ordinance on April 1, 2006.  - History. Until the Meiji Restoration, the area of Osaka prefecture was known as Kawachi, Izumi, and Settsu provinces.    Given the information above, choose from the list below the object entity that exhibits the relation 'connecting line' with the subject 'nakamozu station'.  Choices: - 1  - a  - midōsuji line  - nankai kōya line  - tokyo metro ginza line
Answer:
midōsuji line