CREATE TABLE table_630 ("Client" CLOB, "Years of Operation" CLOB, "Area of Operation" CLOB, "Country" CLOB, "Services" CLOB)

Whose address of operation was the Echirax Concession?
SELECT "Client" FROM table_630 WHERE "Area of Operation" = 'EchiraX Concession'
SELECT "Client" FROM "table_630" WHERE "Area of Operation" = 'EchiraX Concession'