[Q]: Extract the answer to the question from the following context. Question: What category would the bigger DC motors fall into? Context: A PM motor does not have a field winding on the stator frame, instead relying on PMs to provide the magnetic field against which the rotor field interacts to produce torque. Compensating windings in series with the armature may be used on large motors to improve commutation under load. Because this field is fixed, it cannot be adjusted for speed control. PM fields (stators) are convenient in miniature motors to eliminate the power consumption of the field winding. Most larger DC motors are of the "dynamo" type, which have stator windings. Historically, PMs could not be made to retain high flux if they were disassembled; field windings were more practical to obtain the needed amount of flux. However, large PMs are costly, as well as dangerous and difficult to assemble; this favors wound fields for large machines.
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[A]: larger DC motors

[Q]: Extract the answer to the question from the following context. Question: What bus terminal sees the most passengers? Context: Philadelphia is also a major hub for Greyhound Lines, which operates 24-hour service to points east of the Mississippi River. Most of Greyhound's services in Philadelphia operate to/from the Philadelphia Greyhound Terminal, located at 1001 Filbert Street in Center City Philadelphia. In 2006, the Philadelphia Greyhound Terminal was the second busiest Greyhound terminal in the United States, after the Port Authority Bus Terminal in New York. Besides Greyhound, six other bus operators provide service to the Center City Greyhound terminal: Bieber Tourways, Capitol Trailways, Martz Trailways, Peter Pan Bus Lines, Susquehanna Trailways, and the bus division for New Jersey Transit. Other services include Megabus and Bolt Bus.
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[A]: Port Authority Bus Terminal

[Q]: Extract the answer to the question from the following context. Question: Sociology is a? Context: The description or representation of individual and group identity is a central task for psychologists, sociologists and anthropologists and those of other disciplines where "identity" needs to be mapped and defined. How should one describe the identity of another, in ways which encompass both their idiosyncratic qualities and their group memberships or identifications, both of which can shift according to circumstance? Following on from the work of Kelly, Erikson, Tajfel and others Weinreich's Identity Structure Analysis (ISA), is "a structural representation of the individual's existential experience, in which the relationships between self and other agents are organised in relatively stable structures over time with the emphasis on the socio-cultural milieu in which self relates to other agents and institutions" (Weinreich and Saunderson, (eds) 2003, p1). Using constructs drawn from the salient discourses of the individual, the group and cultural norms, the practical operationalisation of ISA provides a methodology that maps how these are used by the individual, applied across time and milieus by the "situated self" to appraise self and other agents and institutions (for example, resulting in the individual's evaluation of self and significant others and institutions).[citation needed]
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[A]: disciplines

[Q]: Extract the answer to the question from the following context. Question: Who declined to introduce the Visible Speech System? Context: Bell's father was invited by Sarah Fuller, principal of the Boston School for Deaf Mutes (which continues today as the public Horace Mann School for the Deaf), in Boston, Massachusetts, to introduce the Visible Speech System by providing training for Fuller's instructors, but he declined the post in favor of his son. Traveling to Boston in April 1871, Bell proved successful in training the school's instructors. He was subsequently asked to repeat the program at the American Asylum for Deaf-mutes in Hartford, Connecticut, and the Clarke School for the Deaf in Northampton, Massachusetts.
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[A]:
Bell's father