user: Question: Name the highest Channel with an Aspect of 4:3, and a PSIP Short Name of IBC-TV?
Columns: ['Channel', 'Video', 'Aspect', 'PSIP Short Name', 'Programming']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [56.1, '720p', '16:9', 'KDOC-HD', 'Main KDOC-TV programming']
SQL:

assistant: SELECT MAX("Channel") FROM "Table" WHERE "Aspect" = '4:3' AND "PSIP Short Name" = 'IBC-TV';