CREATE TABLE table_59697 ("Nat." CLOB, "Name" CLOB, "Moving to" CLOB, "Type" CLOB, "Transfer window" CLOB, "Transfer fee" CLOB, "Source" CLOB)

WHAT IS THE SOURCE WITH A TYPE OF TRANSFER AND MEX?
SELECT "Source" FROM table_59697 WHERE "Type" = 'transfer' AND "Nat." = 'mex'
SELECT "Source" FROM "table_59697" WHERE "Nat." = 'mex' AND "Type" = 'transfer'