user: Question: What is Pos., when From Club is "Chelsea", and when Date is "30 July 2008"?
Columns: ['Date', 'Pos.', 'Player', 'From club', 'Transfer fee']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['2 July 2008', 'FW', 'Jô', 'CSKA Moscow', '£18m']
SQL:

assistant: SELECT "Pos." FROM "Table" WHERE "From club" = 'Chelsea' AND "Date" = '30 July 2008';