CREATE TABLE "1970s_eagles_15_4_1" (
  "year" real,
  "date" text,
  "winner" text,
  "result" text,
  "location" text
);

Question: what is the location when the year is after 1974 and the date is september 19?
SQL: SELECT "location" FROM "1970s_eagles_15_4_1" WHERE "year">1974 AND "date"='september 19';

Question: what is the location when the year is before 1979 and the result is 19-17?
SQL: SELECT "location" FROM "1970s_eagles_15_4_1" WHERE "year"<1979 AND "result"='19-17';

Question: what is the result for 1970 at yankee stadium?
SQL: SELECT "result" FROM "1970s_eagles_15_4_1" WHERE "year"=1970 AND "location"='yankee stadium';

Question: what is the year when the location is yankee stadium and the result is 23-23
SQL: SELECT AVG("year") FROM "1970s_eagles_15_4_1" WHERE "location"='yankee stadium' AND "result"='23-23';