Problem: Annelid:

The annelids are bilaterally symmetrical, triploblastic, coelomate, invertebrate organisms. They also have parapodia for locomotion. Most textbooks still use the traditional division into polychaetes (almost all marine), oligochaetes (which include earthworms) and leech-like species. Cladistic research since 1997 has radically changed this scheme, viewing leeches as a sub-group of oligochaetes and oligochaetes as a sub-group of polychaetes. In addition, the Pogonophora, Echiura and Sipuncula, previously regarded as separate phyla, are now regarded as sub-groups of polychaetes. Annelids are considered members of the Lophotrochozoa, a "super-phylum" of protostomes that also includes molluscs, brachiopods, flatworms and nemerteans.

What are leeches seen as a subgroup of since 1897?
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A: unanswerable


Problem: Aspirated consonant:

In phonetics, aspiration is the strong burst of breath that accompanies either the release or, in the case of preaspiration, the closure of some obstruents. In English, aspirated consonants are allophones in complementary distribution with their unaspirated counterparts, but in some other languages, notably most Indian and East Asian languages, the difference is contrastive.

What uses a weak burst of breath?
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A: unanswerable


Problem: Alfred North Whitehead:

In addition to numerous articles on mathematics, Whitehead wrote three major books on the subject: A Treatise on Universal Algebra (1898), Principia Mathematica (co-written with Bertrand Russell and published in three volumes between 1910 and 1913), and An Introduction to Mathematics (1911). The former two books were aimed exclusively at professional mathematicians, while the latter book was intended for a larger audience, covering the history of mathematics and its philosophical foundations. Principia Mathematica in particular is regarded as one of the most important works in mathematical logic of the 20th century.

How many books on mathematics did Whitehead write?
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A: three


Problem: Indigenous peoples of the Americas:

Aboriginal peoples in Canada comprise the First Nations, Inuit and Métis; the descriptors "Indian" and "Eskimo" are falling into disuse, and other than in neighboring Alaska. "Eskimo" is considered derogatory in many other places because it was given by non-Inuit people and was said to mean "eater of raw meat." Hundreds of Aboriginal nations evolved trade, spiritual and social hierarchies. The Métis culture of mixed blood originated in the mid-17th century when First Nation and native Inuit married European settlers. The Inuit had more limited interaction with European settlers during that early period. Various laws, treaties, and legislation have been enacted between European immigrants and First Nations across Canada. Aboriginal Right to Self-Government provides opportunity to manage historical, cultural, political, health care and economic control aspects within first people's communities.

What resulted from First Nation and Inuit people marrying European settlers?
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A:
The Métis culture