Question: Unveiled in 1991, the Avalon was a concept vehicle does not appear to have any direct relation to the full-size car produced by Toyota in what country?

Context paragraphs:
Chrysler Airflow: The Chrysler Airflow is a full-size car produced by Chrysler from 1934 to 1937.  The Airflow was one of the first full-size American production car to use streamlining as a basis for building a sleeker automobile, one less susceptible to air resistance.  Chrysler made a significant effort at a fundamental change in automotive design with the Chrysler Airflow, but it was ultimately a commercial failure.

Toyota Avalon: The Toyota Avalon is a full-size car produced by Toyota in the United States, and is the flagship sedan of Toyota in the United States, Canada, Puerto Rico, and the Middle East.  It was also produced in Australia from 2000 until July 2005, when it was replaced in November 2006 by the Toyota Aurion.  The first production Avalon rolled off the TMMK assembly line in Georgetown, Kentucky, in September 1994.  A second-generation model was released in the United States and Japan in 1999.

Toyota concept vehicles, 1990–99: Unveiled in 1991, the Avalon was a concept vehicle designed by Calty.  It was a 4-door convertible with styling inspired by the 1960s.  It does not appear to have any direct relation to the Avalon production vehicle of the same name.

BMW Concept 7 Series ActiveHybrid: The BMW Concept 7 Series ActiveHybrid is a concept vehicle developed by BMW and presented at the Paris Motor Show in October 2008.  It is BMW's first mild hybrid and second hybrid concept vehicle after the BMW Concept X6 ActiveHybrid, BMWs first full hybrid revealed at the 2007 Frankfurt Motor Show.  Both models will be ready for mass production at the end of 2009.

Pontiac Grand Prix: The Grand Prix was a line of automobiles produced by the Pontiac Division of General Motors from 1962 through 2002.  First introduced as part of Pontiac's full-size car model offering for the 1962 model year, the marque varied repeatedly in size, luxury, and performance during its lifespan.  Among the changes were positioning in the personal luxury car market segment and mid-size car offering from the 2nd generation to the 5th generation for the sedan and from the 2nd generation to the 6th generation from the coupe; it returned to a full-size car from the 6th generation to the 7th generation for the sedan, positioned below the larger Bonneville in Pontiac's model lineup.

Lexus LF: The Lexus LF line is a series of concept cars built by Lexus, the luxury vehicle division of Toyota Motor Corporation.  The "LF" designation refers to "Lexus Future".  The LF Series vehicles features coupes/convertibles, including: the LF-A, the LF-A Roadster, LF-LC, LF-CC, and the LF-C; sedans: the LF-S, LF-Sh, and LF-Gh; crossover SUVs: the LF-X and LF-Xh; and hatchbacks: the LF-Ch.  The first concept vehicle of the LF Series, the LF-X, appeared in 2003.  The LF Series utilizes L-finesse, a design philosophy named for "Leading Edge" and "finesse", which debuted on the LF Series concepts and later extended to all new production Lexus vehicles.  New vehicle technologies on the LF Series include advanced instrumentation, multiple driver-selected vehicle configurations, hybrid and experimental powertrains, and unconventional driver interface designs.  The vehicles also feature new design cues which derive from the L-finesse design language of "Intriguing Elegance" (純), "Incisive Simplicity" (妙), and "Seamless Anticipation" (予).  Several of the LF concept vehicles have appeared close to their production counterparts, while the design cues of other LF concepts appeared on more distinctly different production vehicles.

Plymouth Fury: The Plymouth Fury is a model of automobile which was produced by Plymouth from 1955 to 1989.  It was introduced for the 1956 model year as a sub-series of the Plymouth Belvedere, becoming a separate series one level above the contemporary Belvedere for 1959.  The Fury was a full-size car from 1959 to 1961, then a mid-size car from 1962 to 1964, again a full-size car from 1965 to 1974, and again a mid-size car from 1975 to 1978.  From 1975 to 1977 the Fury was sold alongside the full-size Plymouth Gran Fury.  In 1978, the B-body Fury was the largest Plymouth, and by 1979, there was no large Plymouth.  This was rectified in 1980 with the R-body Gran Fury, followed by the M-body Fury in 1982.  Production of the last V8, RWD Plymouth Fury ended at Kenosha, WI, on December 23, 1988.  Unlike its sibling brand, Dodge, Plymouth would not live to see the resurgence of the large, V8/RWD sedan.  The last Plymouth rolled off the Belvidere assembly line in 2001.

Honda Legend: The Honda Legend is a V6-engined full-size car produced by the Japanese automaker Honda since 1985 that currently serves as its flagship vehicle and provides the basis for the Acura Legend, RL and RLX the flagship vehicle of Honda's luxury Acura division in North America.

Front and back office application: A front office application is any software that has a direct relation to customers.  It provides functionality and data necessary to take orders, configure complex products and provide effective service and support to customers.  It includes customer relationship management (CRM), sales force automation, customer support and field service.  In turn, a back office application has no such direct relation.  It provides functionality for internal operations such as enterprise resource planning (ERP), inventory control, manufacturing and all of the supply chain activities associated with procuring goods, services and raw materials.  If an ERP system includes order entry and customer service capabilities, that system would bridge both back office and front office.

Chevrolet Corvette (C1): The Chevrolet Corvette (C1) is the first generation of the Corvette sports car produced by Chevrolet.  It was introduced late in the 1953 model year, and produced through 1962.  It is commonly referred to as the "solid-axle" generation, as the independent rear suspension did not appear until the 1963 Sting Ray.  The Corvette was rushed into production for its debut model year to capitalize on the enthusiastic public reaction to the concept vehicle, but expectations for the new model were largely unfulfilled.  Reviews were mixed and sales fell far short of expectations through the car's early years.  The program was nearly canceled, but Chevrolet would ultimately stay the course.

Supporting paragraphs: Toyota concept vehicles, 1990–99 Toyota Avalon
Answer: United States