Employment ( salaries & wages) of 64%, and a Occupational pensions of 6% has what working tax credit?
CREATE TABLE "sources_of_income" (
  "region" text,
  "employment_salaries_wages" text,
  "self_employed" text,
  "investment_income" text,
  "working_tax_credit" text,
  "state_pensions" text,
  "occupational_pensions" text,
  "disability_benefits" text,
  "other_social_security_benefits" text,
  "other_income_sources" text
);
SELECT "working_tax_credit" FROM "sources_of_income" WHERE "employment_salaries_wages"='64%' AND "occupational_pensions"='6%';