user: Question: What is the Venue of the Heptathlon after 2006 where Tatyana Chernova comes in Position 7th?
Columns: ['Year', 'Competition', 'Venue', 'Position', 'Notes']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [2005.0, 'World Youth Championships', 'Marrakech , Morocco', '1st', 'Heptathlon']
SQL:

assistant: SELECT "Venue" FROM "Table" WHERE "Year" > 2006.0 AND "Position" = '7th' AND "Notes" = 'Heptathlon';