user: Question: What was the first airdate or the season that had less than 24 episodes and a Nielsen ranking of #38?
Columns: ['Season', 'Episodes', 'First airdate', 'Last airdate', 'Nielsen ranking']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['Season 1', 6.0, 'March 25, 1986', 'April 29, 1986', '#13']
SQL:

assistant: SELECT "First airdate" FROM "Table" WHERE "Episodes" < 24.0 AND "Nielsen ranking" = '#38';