The 2007–08 Tour de Ski was the 2nd edition of the Tour de Ski and took place from 28 December 2007 until 6 January 2008. The race kicked off in Nové Město, the Czech Republic, and finished in Val di Fiemme, Italy, ten days later. It featured 8 top international cross-country skiing competitions, of which two were sprint events.
There was one Tour de Ski before the 2007–08 Tour de Ski.
A: Yes

Tropical rock (or trop rock) is a genre of popular music with influences from rock and roll, reggae, country music, caribbean, Calypso music and zydeco. It incorporates themes and compositions of a tropical nature and represents a relaxed and easygoing lifestyle.
Tropical rock (or trop rock) is a genre of popular music is very popular
A: It's impossible to say

Earl of Burlington is a title that has been created twice, the first time in the Peerage of England in 1664 and the second in the Peerage of the United Kingdom in 1831. Since 1858, Earl of Burlington has been a courtesy title used by the Dukes of Devonshire, traditionally borne by the duke's grandson, who is the eldest son of the duke's eldest son, the Marquess of Hartington.
There were no Earls of Burlington between 1831 and 1858.
A:
It's impossible to say