user: Question: What network has an aspect of 4:3 and a PSIP Short Name of QVC?
Columns: ['Channel', 'Video', 'Aspect', 'PSIP Short Name', 'Network']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [14.1, '720p', '16:9', 'ION', 'Ion Television']
SQL:

assistant: SELECT "Network" FROM "Table" WHERE "Aspect" = '4:3' AND "PSIP Short Name" = 'QVC';