Problem: Database:

A database management system (DBMS) is a computer software application that interacts with the user, other applications, and the database itself to capture and analyze data. A general-purpose DBMS is designed to allow the definition, creation, querying, update, and administration of databases. Well-known DBMSs include MySQL, PostgreSQL, Microsoft SQL Server, Oracle, Sybase, SAP HANA, and IBM DB2. A database is not generally portable across different DBMSs, but different DBMS can interoperate by using standards such as SQL and ODBC or JDBC to allow a single application to work with more than one DBMS. Database management systems are often classified according to the database model that they support; the most popular database systems since the 1980s have all supported the relational model as represented by the SQL language.[disputed discuss] Sometimes a DBMS is loosely referred to as a 'database'.

How are DBMSs classified?
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A: according to the database model that they support

Problem: Spectre (2015 film):

In the United Kingdom, the film grossed 4.1 million ($6.4 million) from its Monday preview screenings. It grossed 6.3 million ($9.2 million) on its opening day and then 5.7 million ($8.8 million) on Wednesday, setting UK records for both days. In the film's first seven days it grossed 41.7 million ($63.8 million), breaking the UK record for highest first-week opening, set by Harry Potter and the Prisoner of Azkaban's 23.88 million ($36.9 million) in 2004. Its FridaySaturday gross was 20.4 million ($31.2 million) compared to Skyfall's 20.1 million ($31 million). The film also broke the record for the best per-screen opening average with $110,000, a record previously held by The Dark Knight with $100,200. It has grossed a total of $136.3 million there. In the U.K., it surpassed Avatar to become the country's highest-grossing IMAX release ever with $10.09 million.

What film previously held the UK record for highest first week opening gross?
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A: Harry Potter and the Prisoner of Azkaban

Problem: History of science:

Mathematics: From the earliest the Chinese used a positional decimal system on counting boards in order to calculate. To express 10, a single rod is placed in the second box from the right. The spoken language uses a similar system to English: e.g. four thousand two hundred seven. No symbol was used for zero. By the 1st century BC, negative numbers and decimal fractions were in use and The Nine Chapters on the Mathematical Art included methods for extracting higher order roots by Horner's method and solving linear equations and by Pythagoras' theorem. Cubic equations were solved in the Tang dynasty and solutions of equations of order higher than 3 appeared in print in 1245 AD by Ch'in Chiu-shao. Pascal's triangle for binomial coefficients was described around 1100 by Jia Xian.

When did negative numbers and decimals start being used?
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A: 1st century BC

Problem: USB:

The USB Power Delivery revision 2.0 specification has been released as part of the USB 3.1 suite. It covers the Type-C cable and connector with four power/ground pairs and a separate configuration channel, which now hosts a DC coupled low-frequency BMC-coded data channel that reduces the possibilities for RF interference. Power Delivery protocols have been updated to facilitate Type-C features such as cable ID function, Alternate Mode negotiation, increased VBUS currents, and VCONN-powered accessories.

What does the USB Power Delivery revision 2.0 specification cover?
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A:
Type-C cable and connector with four power/ground pairs and a separate configuration channel