The problem: Answer a question about this article:
Selenizza is mainly used as an additive in the road construction sector. It is mixed with traditional bitumen to improve both the viscoelastic properties and the resistance to ageing. It may be blended with the hot bitumen in tanks, but its granular form allows it to be fed in the mixer or in the recycling ring of normal asphalt plants. Other typical applications include the production of mastic asphalts for sidewalks, bridges, car-parks and urban roads as well as drilling fluid additives for the oil and gas industry. Selenizza is available in powder or in granular material of various particle sizes and is packaged in big bags or in thermal fusible polyethylene bags.
What component is added to bitumen to improve it?
****
The answer: Selenizza

The problem: Answer a question about this article:
London is a leading global city, with strengths in the arts, commerce, education, entertainment, fashion, finance, healthcare, media, professional services, research and development, tourism, and transport all contributing to its prominence. It is one of the world's leading financial centres and has the fifth-or sixth-largest metropolitan area GDP in the world depending on measurement.[note 3] London is a world cultural capital. It is the world's most-visited city as measured by international arrivals and has the world's largest city airport system measured by passenger traffic. London is one of the world's leading investment destinations, hosting more international retailers and ultra high-net-worth individuals than any other city. London's 43 universities form the largest concentration of higher education institutes in Europe, and a 2014 report placed it first in the world university rankings. According to the report London also ranks first in the world in software, multimedia development and design, and shares first position in technology readiness. In 2012, London became the first city to host the modern Summer Olympic Games three times.
How many universities are located in London?
****
The answer: 43

The problem: Answer a question about this article:
Somali cuisine varies from region to region and consists of a fusion of diverse culinary influences. It is the product of Somalia's rich tradition of trade and commerce. Despite the variety, there remains one thing that unites the various regional cuisines: all food is served halal. There are therefore no pork dishes, alcohol is not served, nothing that died on its own is eaten, and no blood is incorporated.
Along with alcohol, what liquid is never present in halal food?
****
The answer: blood

The problem: Answer a question about this article:
The New York Public Library, which has the largest collection of any public library system in the United States, serves Manhattan, the Bronx, and Staten Island. Queens is served by the Queens Borough Public Library, the nation's second largest public library system, while the Brooklyn Public Library serves Brooklyn.
What is the second largest library in the US?
****
The answer:
Queens Borough Public Library