Name the sum of gross tonnage for wood on date more tahn 1846 for comissioned and ship of esk
CREATE TABLE "list_of_rmsp_company_vessels" (
  "ship" text,
  "date_commissioned" real,
  "gross_tonnage" real,
  "propulsion" text,
  "material" text
);
SELECT SUM("gross_tonnage") FROM "list_of_rmsp_company_vessels" WHERE "material"='wood' AND "date_commissioned">1846 AND "ship"='esk';