The "Orient Express" is the 7 train that takes you to the many Asian neighborhoods of Queens. "International Line" is the "politically correct" term.

The real "Express d'Orient" began in 1883, taking passengers from Paris to Vama on the Black Sea, and from there to Istanbul. Agatha Christie (1890-1976) popularized that train with her murder mystery, Murder in the Calais Coach (1960), or Murder on the Orient Express. The book later became the basis for the popular movie Murder on the Orient Express (1974)

New York's "Orient Express" is relatively murder-free, fortunately.

19 August 1985, New York (NY) Times, pg. 28:
Many of them (Asian immigrants--ed.) have followed the path of the No. 7 line - dubbed "the Orient Express" by many - into northern Queens, most often to Flushing.

14 September 1986, New York (NY) Times, pg. R7:
"The IRT No. 7 train to Flushing is being called the 'Orient Express,'" he (John Wang, vice president of the Chinatown Planning Council--ed.) said, "because so many Asians are riding it to satellite Chinatowns in Newtown Creek, Elmhurst and particularly Flushing."

20 November 1988, New York (NY) Times, pg. SMA26:
NO. 7 LINE - THE ORIENT EXPRESS.