Which station has 3,871 riders per mile, and an annual ridership in 2012 of larger than 15,399,400?
CREATE TABLE "see_also" (
  "annual_ridership_2012" real,
  "rider_per_mile" real,
  "opened" real,
  "stations" real,
  "lines" real
);
SELECT MAX("stations") FROM "see_also" WHERE "rider_per_mile"='3,871' AND "annual_ridership_2012">'15,399,400';