user: Question: What episode number in the series originally aired on February 28, 1992?
Columns: ['No. in series', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code']
Types: ['real', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, '"Pilot"', 'Richard Correll', 'William Bickley & Michael Warren', 'September 20, 1991', 475049.0]
SQL:

assistant: SELECT "No. in series" FROM "Table" WHERE "Original air date" = 'February 28, 1992';