CREATE TABLE "canadian_national_championships" (
  "year" text,
  "mens_singles" text,
  "womens_singles" text,
  "mens_doubles" text,
  "womens_doubles" text,
  "mixed_doubles" text
);

Question: Name the number of women's doubles for 1986
SQL: SELECT COUNT("womens_doubles") FROM "canadian_national_championships" WHERE "year"='1986';