What is the largest district for delegate Cheryl Glenn, that she had taken after 2006?
CREATE TABLE "current_members_of_the_baltimore_city_de" (
  "district" real,
  "place_of_birth" text,
  "delegate" text,
  "party" text,
  "took_office" real,
  "committee" text
);
SELECT MAX("district") FROM "current_members_of_the_baltimore_city_de" WHERE "delegate"='cheryl glenn' AND "took_office">2006;