    Sentence I: NBC probably will end the season ag the’  ‘second most popular fietwork befind:CBS.:although’  it's. first’ amorig- “the: "key’. 18-to- “49-year-old.  demagraphic... * ‘ 2 :   *,    Séntence 2:N&C wil probably.énd the'séasdn:as the  secorid. most-popular network behl BS which is  frgt-dmang the” key" [8-to-4 ges lemoataghic.                   