Definition: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

Positive Example 1 -
Input: Who was the first American President?
Output: president of the united states

Positive Example 2 -
Input: The Dutch duo of Ray Slijngaard and Anita Dels, who had 8 top ten hits in the 90s, were better known by what name?
Output: anita doth

Negative Example 1 -
Input: Anna Smashnova played which sport professionally until 2007?
Output: sport

Negative Example 2 -
Input: Rob Davis, Les Gray, Dave Mount and Ray Stiles are members of which pop group?
Output: david

Now complete the following example -
Input: What remake of a British science-fiction serial broadcast by BBC Television in the summer of 1953 was staged live by BBC Four in 2005 with actors Jason Flemyng, Mark Gatiss, Andrew Tiernan, Indira Varma, David Tennant and Adrian Bower?

Output: jason flemyng, bbc, david tennant, bbc one, bbc four, indira varma, mark gatiss, adrian