(Question)
Information: - A clay court is one of many different types of tennis court. Clay courts are made of crushed shale, stone or brick. The French Open uses clay courts, making it unique among the Grand Slam tournaments. Clay courts are more common in Continental Europe and Latin America than in the United States, Canada or Britain. Two types exist: red clay, the more common variety, and green clay, also known as "rubico", which is a harder surface. Although less expensive to construct than other types of tennis courts, the maintenance costs of clay are high as the surface must be rolled to preserve flatness. The water content must also be balanced; green courts are often sloped in order to allow water run-off. - The Forest Hills Tennis Classic is a defunct professional women 's tennis tournament played on outdoor hard courts . It was part of the Tier V Series of the WTA Tour in 2004 , then of the Tier IV Series from 2005 to 2008 . It was held annually at the West Side Tennis Club in Forest Hills , New York City , New York , United States , from 2004 to 2008 . - The West Side Tennis Club is a private tennis club located in Forest Hills, a neighborhood in the New York City borough of Queens. The Club has 38 tennis courts in all four surfaces (clay court, Har-Tru, grass court and hardcourt), a junior Olympic-size swimming pool and other amenities. It is the home of the Forest Hills Stadium, a 14,000 seat outdoor tennis stadium and concert venue. - A grass court is one of the four different types of court on which the sport of tennis, originally known as "lawn tennis", is played. Grass courts are made of grasses in different compositions depending on the tournament. - A hardcourt (or hard court) is a surface or floor on which a sport is played, most usually in reference to tennis courts. They are typically made of rigid materials such as asphalt or concrete, and covered with acrylic material to seal the surface and mark the playing lines, while providing some cushioning. Historically, hardwood surfaces were also in use in indoor settings, similar to an indoor basketball court, but these are now rare. Given the information above, choose from the list below the object entity that exhibits the relation 'surface played on' with the subject 'forest hills tennis classic'. Choices: - clay court - grass - hardcourt
(Answer)
hardcourt

(Question)
Information: - Nitrogen dioxide is the chemical compound with the formula . It is one of several nitrogen oxides. is an intermediate in the industrial synthesis of nitric acid, millions of tons of which are produced each year. At higher temperatures it is a reddish-brown gas that has a characteristic sharp, biting odor and is a prominent air pollutant. Nitrogen dioxide is a paramagnetic, bent molecule with C point group symmetry. - Nitryl fluoride , NO2F , is a colourless gas and strong oxidizing agent , which is used as a fluorinating agent and has been proposed as an oxidiser in rocket propellants ( though never flown ) . It is a molecular species , not ionic , consistent with its low boiling point . The structure features planar nitrogen with a short N - F bond length of 135 pm . - Nitryl is the nitrogen dioxide (NO) moiety when it occurs in a larger compound. Examples include nitryl fluoride (NOF) and nitryl chloride (NOCl). Given the information above, choose from the list below the object entity that exhibits the relation 'instance of' with the subject 'nitryl fluoride'. Choices: - chemical - chemical compound - chloride - fluoride - formula - molecule - rocket - species
(Answer)
chemical compound

(Question)
Information: - Wolfenstein 3D is a first-person shooter video game developed by id Software and published by Apogee Software and FormGen. Originally released on May 5, 1992, for MS-DOS, the game was inspired by the 1981 Muse Software video game "Castle Wolfenstein". In "Wolfenstein 3D", the player assumes the role of Allied spy William "B.J." Blazkowicz during World War II as he escapes from the Nazi German prison Castle Wolfenstein and carries out a series of crucial missions against the Nazis. The player traverses through each of the game's levels to find an elevator to the next level or kill a final boss, fighting Nazi soldiers, dogs, and other enemies with knives, pistols, and other guns. - 3D Realms (legal name "Apogee Software, Ltd.") is an American video game publisher and video game developer based in Garland, Texas, United States, established in 1987. It is best known for popularizing the shareware distribution model and as the creator of franchises on the PC such as "Duke Nukem", and also the publisher of other franchises such as "Commander Keen" and "Wolfenstein 3D". - Castle Wolfenstein is an early stealth-based action-adventure shooter video game developed by Muse Software for the Apple II. It was first released in 1981 and later ported to MS-DOS, the Atari 8-bit family, and the Commodore 64. "Beyond Castle Wolfenstein" was a sequel. This game is notably considered to be the first game that had a World War 2 setting, and the first series in general that would popularize this setting across succeeding games and other unrelated game series in various genres. - Muse Software was a Baltimore-based software and computer game publisher and developer for the first generation of home computers. They first published for the Apple II under the name Micro Users Software Exchange, and later expanded to the Commodore 64, Atari, and IBM PC markets. They are best known for publishing the original "Castle Wolfenstein" in 1981. - MS-DOS (; acronym for "Microsoft Disk Operating System") is a discontinued operating system for x86-based personal computers mostly developed by Microsoft. It was the most commonly used member of the DOS family of operating systems, and was the main operating system for IBM PC compatible personal computers during the 1980s and the early 1990s, when it was gradually superseded by operating systems offering a graphical user interface (GUI), in various generations of the graphical Microsoft Windows operating system by Microsoft Corporation. - Capstone Software was a subsidiary of IntraCorp, a Miami-based computer and video game company. Founded in 1984, Capstone created first-person games such as "Corridor 7: Alien Invasion", "William Shatner's TekWar" and "Witchaven", and is also known for releasing games based on movie/TV licenses. Capstone's first-person games used the "Wolfenstein 3D" engine, and later, the Build engine (best known for powering 3D Realms' "Duke Nukem 3D"). - Operation Body Count is a 1994 first - person shooter that used the Wolfenstein 3D ray casting engine . It was developed and published by Capstone Software . Given the information above, choose from the list below the object entity that exhibits the relation 'platform' with the subject 'operation body count'. Choices: - apple ii - commodore 64 - dos - ibm pc compatible - microsoft windows - pc - windows
(Answer)
dos