CREATE TABLE table_204_539 (id NUMBER, "date" CLOB, "name" CLOB, "moving from" CLOB, "moving to" CLOB, "fee" CLOB)

what team was silvestre varela a member of before moving to porto ?
SELECT "moving from" FROM table_204_539 WHERE "name" = 'silvestre varela'
SELECT "moving from" FROM "table_204_539" WHERE "name" = 'silvestre varela'