Problem: Incandescent light bulb:

Prompted by legislation in various countries mandating increased bulb efficiency, new "hybrid" incandescent bulbs have been introduced by Philips. The "Halogena Energy Saver" incandescents can produce about 23 lm/W; about 30 percent more efficient than traditional incandescents, by using a reflective capsule to reflect formerly wasted infrared radiation back to the filament from which it can be re-emitted as visible light. This concept was pioneered by Duro-Test in 1980 with a commercial product that produced 29.8 lm/W. More advanced reflectors based on interference filters or photonic crystals can theoretically result in higher efficiency, up to a limit of about 270 lm/W (40% of the maximum efficacy possible). Laboratory proof-of-concept experiments have produced as much as 45 lm/W, approaching the efficacy of compact fluorescent bulbs.

Which concept was not pioneered by Duro-Test in 1980?
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A: unanswerable

Problem: Cardinal (Catholicism):

Since 1962, the cardinal bishops have only a titular relationship with the suburbicarian sees, with no powers of governance over them. Each see has its own bishop, with the exception of Ostia, in which the Cardinal Vicar of the see of Rome is apostolic administrator.

What type of relationship did the pope have with suburbicarian sees?
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A: unanswerable

Problem: Portugal:

In the classical music domain, Portugal is represented by names as the pianists Artur Pizarro, Maria Joao Pires, Sequeira Costa, the violinists Carlos Damas, Gerardo Ribeiro and in the past by the great cellist Guilhermina Suggia. Notable composers include Jose Vianna da Motta, Carlos Seixas, Joao Domingos Bomtempo, Joao de Sousa Carvalho, Luis de Freitas Branco and his student Joly Braga Santos, Fernando Lopes-Graca, Emmanuel Nunes and Sergio Azevedo. Similarly, contemporary composers such as Nuno Malo and Miguel d'Oliveira have achieved some international success writing original music for film and television.

Who are some contemporary composers from Portugal?
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A: Nuno Malo and Miguel d'Oliveira

Problem: Muslim world:

A famous example of Arabic poetry and Persian poetry on romance (love) is Layla and Majnun, dating back to the Umayyad era in the 7th century. It is a tragic story of undying love much like the later Romeo and Juliet, which was itself said to have been inspired by a Latin version of Layla and Majnun to an extent. Ferdowsi's Shahnameh, the national epic of Iran, is a mythical and heroic retelling of Persian history. Amir Arsalan was also a popular mythical Persian story, which has influenced some modern works of fantasy fiction, such as The Heroic Legend of Arslan.

What was inspired by Romeo and Juliet?
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A:
unanswerable