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

[EX Q]: Which group of the 1970's featured Tony Iommi on guitar, Geezer Butler on bass and Bill Ward on drums?
[EX A]: geezer butler

[EX Q]: Who plays Isobel Crawley in the UK television series 'Downton Abbey'?
[EX A]: downton abbey

[EX Q]: How are the states of Ajman, al-Fujairah, Ras-al Khaimah, Sharjah, Umm al-Quwain and two others collectively known?
[EX A]:
sharjah