CREATE TABLE table_name_83 (social_ao VARCHAR(255), external_co VARCHAR(255), internal_co VARCHAR(255))
What Social AO has an External CO of simonas savickas, and an Internal CO of pieter kuijsten?
    
SQL: SELECT social_ao FROM table_name_83 WHERE external_co = "simonas savickas" AND internal_co = "pieter kuijsten"