What is the network brand name of the company vodafone group in Germany?
CREATE TABLE "ecosystem_operators_mobile_phone_and_cli" (
  "company_name" text,
  "network_brand_name" text,
  "country" text,
  "accreditation_type" text,
  "accreditation_level" text,
  "date" text
);
SELECT "network_brand_name" FROM "ecosystem_operators_mobile_phone_and_cli" WHERE "company_name"='vodafone group' AND "country"='germany';