What was the age of the member of the United States House of Representatives that began their term on May 7, 1886?
CREATE TABLE "historical" (
  "begin_date" text,
  "representative" text,
  "date_of_birth" text,
  "house_term" text,
  "state_served" text,
  "party" text,
  "age_years_days" text
);
SELECT "age_years_days" FROM "historical" WHERE "begin_date"='may 7, 1886';