In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

What are digital albums?, Context: In 2014 artist Jack White sold 40,000 copies of his second solo release, Lazaretto, on vinyl. The sales of the record beat the largest sales in one week on vinyl since 1991. The sales record was previously held by Pearl Jam's, Vitalogy, which sold 34,000 copies in one week in 1994. In 2014, the sale of vinyl records was the only physical music medium with increasing sales with relation to the previous year. Sales of other mediums including individual digital tracks, digital albums and compact discs have fallen, the latter having the greatest drop-in-sales rate.
mediums

Who was chair of the IPCC in 1990?, Context: Korean economist Hoesung Lee is the chair of the IPCC since October 8, 2015, following the election of the new IPCC Bureau. Before this election, the IPCC was led by his vice-Chair Ismail El Gizouli, who was designated acting Chair after the resignation of Rajendra K. Pachauri in February 2015. The previous chairs were Rajendra K. Pachauri, elected in May 2002; Robert Watson in 1997; and Bert Bolin in 1988. The chair is assisted by an elected bureau including vice-chairs, working group co-chairs, and a secretariat.
Bert Bolin

A councilman is around for?, Context: Richmond city government consists of a city council with representatives from nine districts serving in a legislative and oversight capacity, as well as a popularly elected, at-large mayor serving as head of the executive branch. Citizens in each of the nine districts elect one council representative each to serve a four-year term. Beginning with the November 2008 election Council terms was lengthened to 4 years. The city council elects from among its members one member to serve as Council President and one to serve as Council Vice President. The city council meets at City Hall, located at 900 E. Broad St., 2nd Floor, on the second and fourth Mondays of every month, except August.

4 years