CREATE TABLE "railway" (
"Railway_ID" int,
"Railway" text,
"Builder" text,
"Built" text,
"Wheels" text,
"Location" text,
"ObjectNumber" text,
PRIMARY KEY ("Railway_ID")
)

CREATE TABLE "train" (
"Train_ID" int,
"Train_Num" text,
"Name" text,
"From" text,
"Arrival" text,
"Railway_ID" int,
PRIMARY KEY ("Train_ID"),
FOREIGN KEY ("Railway_ID") REFERENCES `railway`("Railway_ID")
)

CREATE TABLE "manager" (
"Manager_ID" int,
"Name" text,
"Country" text,
"Working_year_starts" text,
"Age" int,
"Level" int,
PRIMARY KEY ("Manager_ID")
)

CREATE TABLE "railway_manage" (
"Railway_ID" int,
"Manager_ID" int,
"From_Year" text,
PRIMARY KEY ("Railway_ID","Manager_ID"),
FOREIGN KEY ("Manager_ID") REFERENCES "manager"("Manager_ID"),
FOREIGN KEY ("Railway_ID") REFERENCES "railway"("Railway_ID")
)
SELECT count(*) FROM railway
How many railways are there?