Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.

Who played Sandy in the 1975 film Grease?
olivia newton-john

Who wrote the 1964 play 'Entertaining Mr Sloane'?
joe orton

Which media mogul, domestic expert, and former stockbroker, had to step down from her various media enterprises to serve 5 months in a federal penitentiary for insider trading in 2004?
martha stewart