What is every 5-year peak when Emanuel Lasker, 2847 is the 10-year peak?
CREATE TABLE "chessmetrics" (
  "rank" real,
  "1_year_peak" text,
  "5_year_peak" text,
  "10_year_peak" text,
  "15_year_peak" text,
  "20_year_peak" text
);
SELECT "5_year_peak" FROM "chessmetrics" WHERE "10_year_peak"='Emanuel Lasker, 2847';