The problem: Answer a question about this article:
The different dialects show many sound shifts in different vowels (even shifting between diphthongs and monophthongs), and in some cases consonants also shift pronunciation. For example, an oddity of West Flemings (and to a lesser extent, East Flemings) is that, the voiced velar fricative (written as "g" in Dutch) shifts to a voiced glottal fricative (written as "h" in Dutch), while the letter "h" in West Flemish becomes mute (just like in French). As a result, when West Flemish try to talk Standard Dutch, they're often unable to pronounce the g-sound, and pronounce it similar to the h-sound. This leaves f.e. no difference between "held" (hero) and "geld" (money). Or in some cases, they are aware of the problem, and hyper-correct the "h" into a voiced velar fricative or g-sound, again leaving no difference.
What other European language has a mute "h" like the West Flemings do?
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The answer: French

The problem: Answer a question about this article:
In the 1980s, mixed tag team matches began to take place, with a male and female on each team and a rule stating that each wrestler could only attack the opponent of the same gender. If a tag was made, the other team had to automatically switch their legal wrestler as well. Despite these restrictions, many mixed tag matches do feature some physical interaction between participants of different genders. For example, a heel may take a cheap shot at the female wrestler of the opposing team to draw a negative crowd reaction. In lucha libre, cheap-shots and male-female attacks are not uncommon.
What does a mixed tag team consist of?
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The answer: a male and female on each team

The problem: Answer a question about this article:
A solar chimney (or thermal chimney, in this context) is a passive solar ventilation system composed of a vertical shaft connecting the interior and exterior of a building. As the chimney warms, the air inside is heated causing an updraft that pulls air through the building. Performance can be improved by using glazing and thermal mass materials in a way that mimics greenhouses.
What is a solar chimney?
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The answer: a passive solar ventilation system

The problem: Answer a question about this article:
In the Netherlands, four former institutes of technology have become universities over the past decades. These are the current three Technical Universities (at Delft, Eindhoven and Enschede), plus the former agricultural institute in Wageningen. A list of all hogescholen in the Netherlands, including some which might be called polytechnics, can be found here.
How many institutes of technology in the Netherlands have converted into full-fledged universities in the past few decades?
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The answer:
four