Question: What car was unveiled in autumn of 2007 at the Frankfort Motor Show as a replacement for the Jaguar S-Type?
Context: The Jaguar XF is an executive/mid-size luxury car and estate produced by British car manufacturer Jaguar.  It was first unveiled in autumn 2007 as a replacement for the Jaguar S-Type. The Jaguar C-X16 is a concept hybrid electric sports car that was unveiled by Jaguar Cars at the 2011 Frankfurt motor show on 13 September.  In April 2012, Jaguar announced that they will be manufacturing a new sports car based on the Jaguar C-X16 called the F-Type, which was subsequently shown to the public (in non-hybrid form) at the Paris Motor Show in September 2012. The Bertone Pirana (or Jaguar Pirana) (not "Piranha" as some sources have it, although the badge on the rear of the car reads Piranha ) was a concept car created by Bertone for the 1967 London Motor Show at Earl's Court.  The sleek GT car was based on the chassis and powertrain of the 4.2 litre Jaguar E-type but was re-bodied with a unique steel monocoque body and luxurious interior.  The Pirana was designed by Marcello Gandini, perhaps best known for styling the Lamborghini Countach.  Unusually for a show car, the Pirana was commissioned as a publicity stunt by the Daily Telegraph, a leading British daily newspaper, as an example of an "ideal car."  The car was originally registered "TGF 1F".  After a successful showing at the London Motor show, the Pirana was subsequently exhibited at the New York City car show and then at the British Motor Show in Montreal. The Jaguar AJ-8 is a compact DOHC V8 piston engine used in many Jaguar vehicles.  It was the fourth new engine type in the history of the company.  In 1997 it replaced both designs previously available on Jaguar cars: the straight-6 Jaguar AJ6 engine (or rather its AJ16 variant), and the Jaguar V12 engine.  It remained the only engine type available on Jaguar until 1999 with the launch of the S-Type, when the Jaguar AJ-V6 engine was added to the list.  The AJ-V8 is available in displacements ranging from 3.2 L to 5.0 L, and a supercharged version is also produced.  Ford Motor Company used this small V8 in other products as well, including the Lincoln LS the 2002-2005 Ford Thunderbird as well as in several Land Rovers and the Aston Martin V8 Vantage. The Jaguar 420 (pronounced "four-twenty") and its Daimler Sovereign equivalent were introduced at the October 1966 London Motor Show and produced for two years as the ultimate expression of a series of "compact sporting saloons" offered by Jaguar throughout that decade, all of which shared the same wheelbase.  Developed from the Jaguar S-Type, the 420 cost around £200 more than that model and effectively ended buyer interest in it, although the S-Type continued to be sold alongside the 420/Sovereign until both were supplanted by the Jaguar XJ6 late in 1968. The Jaguar XK (project code X150) is the second generation of the Jaguar XK grand tourer from Jaguar Cars.  The vehicle was unveiled in 2005 at the Frankfurt Motor Show with the first generation's 4.2-litre V8 engine.  The XK convertible was unveiled in 2006 North American International Auto Show in Detroit.  A facelifted XK was launched in 2009 with a new 5.0-litre V8.  The production of the XK ended in summer 2014. The Jaguar S-Type is a saloon car produced by Jaguar Cars in the United Kingdom from 1963 to 1968.  Announced 30 September 1963 it was a technically more sophisticated development of the Mark 2, offering buyers a more luxurious alternative without the size and expense of the Mark X.  The S-Type sold alongside the Mark 2, as well as the Jaguar 420 following its release in 1966. Browns Lane in Coventry, England was originally built as a Second World War shadow factory run by The Daimler Company Limited.  In 1951 it was leased by Jaguar Cars and remained the company's home until 2005.  It was the site of all Jaguar production until 1998, when production of the Jaguar S-Type commenced at Castle Bromwich, as well as the firm's corporate headquarters and the home of the Jaguar Daimler Heritage Trust.  Although the site runs the length of Browns Lane, its proper entrance is now on Coundon Wedge Drive. The Jaguar C-XF (for Concept-XF) was a concept car that was designed to showcase the preliminary styling cues of the yet to be announced Jaguar XF.  The C-XF was unveiled in the 2007 North American International Auto Show with the production XF announced in the autumn of 2007 at the Frankfurt Motor Show. The Jaguar S-Type was a model of an executive car that debuted at the 1998 Birmingham Motor Show and was marketed by Jaguar for model years 1999-2008, reviving the nameplate of the company's 1963-66 S-Type as a four-door notchback saloon.  The S-Type received a mild facelift for model year 2005.
Answer: Jaguar XF