CREATE TABLE table_48620 ("Date" TEXT, "Pos." TEXT, "Player" TEXT, "From club" TEXT, "Transfer fee" TEXT)

What is Pos., when From Club is 'Chelsea', and when Date is '30 July 2008'?
SELECT "Pos." FROM table_48620 WHERE "From club" = 'chelsea' AND "Date" = '30 july 2008'
SELECT "Pos." FROM "table_48620" WHERE "Date" = '30 july 2008' AND "From club" = 'chelsea'