It was selected by organisers as their favourite and was answered by Dallas Campbell and Dr Yan Wong, presenters of BBC1 show Bang Goes The Theory.
Dallas | Dallas Cowboys | Glen Campbell | Naomi Campbell | Bruce Campbell | Joseph Campbell | Dallas Stars | Dallas Symphony Orchestra | Dallas Opera | Alastair Campbell | Dallas Mavericks | Luther Campbell | Dallas County, Texas | Campbell Soup Company | Campbell Scott | South Dallas | Dallas (1978 TV series) | Campbell | Martin Campbell | Fort Campbell | Eddie Campbell | Dallas Austin | Nicky Campbell | Maurine Dallas Watkins | Malcolm Campbell | Dallas–Fort Worth metroplex | Campbell River, British Columbia | Campbell River | West Dallas | Vivian Campbell |