user: Question: What is the axis unit of the aircraft Yak-1b "White 23", flown on 19.07.1943?
Columns: ['Date (dd.mm.yyyy)', 'Soviet Unit', 'Aircraft flown', 'Enemy Aircraft', 'Axis Unit']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['13.09.1942', '437 IAP', 'Yak-1 "White 02"', 'Ju.88', 'Luftwaffe (**)']
SQL:

assistant: SELECT "Axis Unit" FROM "Table" WHERE "Aircraft flown" = 'Yak-1b "White 23"' AND "Date (dd.mm.yyyy)" = '19.07.1943';