user: Question: What Rating has Viewers (m) of 2.73?
Columns: ['Episode', '18-49', 'Viewers (m)', 'Rating', 'Share']
Types: ['text', 'text', 'real', 'text', 'text']
Sample row: ['Hero', '3.2/8', 12.16, '7.2', '11']
SQL:

assistant: SELECT "Rating" FROM "Table" WHERE "Viewers (m)" = 2.73;