user: Question: Where the 18-49 age range voted over 4.9 and has 2 epieosdes, what's the lowest number of viewers?
Columns: ['Episode', 'Title', 'Airdate', 'Rating', 'Share', '18-49', 'Viewers', 'Rank']
Types: ['real', 'text', 'text', 'real', 'real', 'real', 'real', 'text']
Sample row: [1.0, '"Pilot (aka I Am Not Going to Sell Herbalux)"', 'September 28, 2006', 10.7, 17.0, 5.5, 16.32, '#9']
SQL:

assistant: SELECT MIN("Viewers") FROM "Table" WHERE "Episode" = 2.0 AND "18-49" > 4.9;