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

[Q]: 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.
[A]: Bert Bolin


[Q]: Why might I question the ethics of the Allies?, Context: As an important railroad and road junction and production center, Hanover was a major target for strategic bombing during World War II, including the Oil Campaign. Targets included the AFA (Stöcken), the Deurag-Nerag refinery (Misburg), the Continental plants (Vahrenwald and Limmer), the United light metal works (VLW) in Ricklingen and Laatzen (today Hanover fairground), the Hanover/Limmer rubber reclamation plant, the Hanomag factory (Linden) and the tank factory M.N.H. Maschinenfabrik Niedersachsen (Badenstedt). Forced labourers were sometimes used from the Hannover-Misburg subcamp of the Neuengamme concentration camp. Residential areas were also targeted, and more than 6,000 civilians were killed by the Allied bombing raids. More than 90% of the city center was destroyed in a total of 88 bombing raids. After the war, the Aegidienkirche was not rebuilt and its ruins were left as a war memorial.
[A]: more than 6,000 civilians were killed by the Allied bombing raids


[Q]: Who first portrayed Chopin in a film?, Context: Chopin's life and his relations with George Sand have been fictionalized in numerous films. The 1945 biographical film A Song to Remember earned Cornel Wilde an Academy Award nomination as Best Actor for his portrayal of the composer. Other film treatments have included: La valse de l'adieu (France, 1928) by Henry Roussel, with Pierre Blanchar as Chopin; Impromptu (1991), starring Hugh Grant as Chopin; La note bleue (1991); and Chopin: Desire for Love (2002).
[A]:
Pierre Blanchar