For the group name European Progressive Democrats what is the French abbr?
CREATE TABLE "national_conservatives" (
  "group_name" text,
  "english_abbr" text,
  "french_abbr" text,
  "formal_european_parliament_name" text,
  "from" text
);
SELECT "french_abbr" FROM "national_conservatives" WHERE "group_name"='european progressive democrats';