Problem: Given the question: Information:  - A part song, or part-song or partsong, is a form of choral music that consists of a secular song having been written or arranged for several vocal parts, commonly SATB choir but sometimes for an all-male or all-female ensemble. It is usually primarily homophonic, with the highest part carrying the melody and the other voices supplying the accompanying harmonies, rather than contrapuntal like a madrigal. Part songs are intended to be sung unaccompanied unless an instrumental accompaniment is specified.  - A glee is an English type of part song spanning the late baroque , classical and early romantic periods . It is usually scored for at least three voices , and generally intended to be sung unaccompanied . Glees often consist of a number of short , musically contrasted movements and their texts can be convivial , fraternal , idyllic , tender , philosophical or even ( occasionally ) dramatic . Their respectable and artistic character contrasts with the bawdiness of many catches of the late 15th century , which made glees appropriate in female company . Although most glees were originally written to be sung in gentlemen 's singing clubs , they often included soprano parts -- which were sung by boys ( church choristers ) in earlier years , and later by ladies who were often present as guests . Glees as described above fall into a different musical category from traditional college songs or fight songs .  - In music, SATB is an initialism for soprano, alto, tenor, bass, defining the voice types required by a chorus or choir to perform a particular musical work. Pieces written for SATB (the most common combination, and used by most hymn tunes) can be sung by choruses of mixed genders, by choirs of men and boys, or by four soloists.  There is a lack of general agreement on other initialisms/abbreviations. "Tr" for Treble, "Mz" (or similar) for Mezzo-soprano, "Ba", "Bar" or "Bari" for Baritone are self-explanatory, while "C" could be taken for "canto", the highest part, or for Contralto, usually implying a female alto(s) as opposed to a Countertenor ("Ct"). "SCTB" is commonly found in Romantic Italian opera choruses where the Alto singers portray a group of female protagonists on stage.    What is the relationship between 'glee ' and 'partsong'?
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The answer is:
subclass of


Please answer this: Information:  - A steam locomotive is a railway locomotive that produces its pulling power through a steam engine. These locomotives are fueled by burning combustible materialusually coal/coke, wood, or oilto produce steam in a boiler. The steam moves reciprocating pistons which are mechanically connected to the locomotive's main wheels (drivers). Both fuel and water supplies are carried with the locomotive, either on the locomotive itself or in wagons (tenders) pulled behind. The first steam locomotive, made by Richard Trevithick, first operated on 21 February 1804, three years after the road locomotive he made in 1801. The first practical steam locomotive was built in 1812-13 by John Blenkinsop.  - The Milwaukee Road 's class F7 comprised six ( # 100 -- # 105 ) high - speed , streamlined 4 - 6 - 4 `` Baltic '' or `` Hudson '' type steam locomotives built by Alco in 1937 -- 38 to haul the Milwaukee 's Hiawatha express passenger trains . Following on from the success of the road 's class A 4 - 4 - 2s , the F7s allowed the road to haul heavier trains on the popular Chicago -- Twin Cities routes . The F7s are major contenders for the fastest steam locomotives ever built , as they ran at over 100 miles per hour ( 160 km / h ) daily . One run in January 1941 recorded by a reporter for Trains magazine saw 110 miles per hour ( 180 km / h ) achieved twice -- in the midst of a heavy snowstorm . Baron Gérard Vuillet , a French railroading expert , once recorded a run between Chicago and Milwaukee where the locomotive reached 125 mph ( 201 km / h ) and sustained an average 120 mph ( 190 km / h ) for 4.5 miles ( 7.2 km ) . However , the British locomotive LNER Class A4 4468 Mallard is officially accepted to be the world 's fastest , with a run recorded at 125.88 mph ( 202.58 km / h ) in 1938 . The Milwaukee F7s are accepted as the fastest steam locomotives by a different measure -- scheduled speed between stations . In 1939 , shortly after they were introduced into passenger service , the Twin Cities Hiawatha schedule was modified such that the engines would need to run the 78.3 mi ( 126.0 km ) between Portage and Sparta , Wisconsin in 58 minutes -- a start - to - stop average of 81 mph ( 130 km / h ) . First - built # 100 was also the first withdrawn from service , on November 10 , 1949 ; last - built # 105 was the final one in service , withdrawn August 10 , 1951 . All were scrapped .  - On a steam locomotive, a driving wheel is a powered wheel which is driven by the locomotive's pistons (or turbine, in the case of a steam turbine locomotive). On a conventional, non-articulated locomotive, the driving wheels are all coupled together with side rods (also known as coupling rods); normally one pair is directly driven by the main rod (or connecting rod) which is connected to the end of the piston rod; power is transmitted to the others through the side rods.  - Under the Whyte notation for the classification of steam locomotives, represents the wheel arrangement of four leading wheels, six powered and coupled driving wheels and four trailing wheels. In France, where the type was first used, it is known as the Baltic, while it became known as the Hudson in most of North America.    What is the relationship between 'milwaukee road class f7' and 'steam engine'?
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Answer:
powerplant