user: ### NOW ANSWER:
Question: Whose address of operation was the EchiraX Concession? 
Columns: ['Client', 'Years of Operation', 'Area of Operation', 'Country', 'Services']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Agoco', '1991-current', 'Sarir field', 'Libya', 'Drilling, workover']
SQL:

assistant: SELECT "Client" FROM "Table" WHERE "Area of Operation" = 'EchiraX Concession';