sentence: The first generation was sold as the Vauxhall Carlton in the UK and was facelifted in 1991 It was sold as the Vauxhall Omega in the UK with the second generation which arrived in 1994 with a facelift in late 1999.
modified: fix grammar: The first generations was sold as the Vauxhalls Carltons in the UKs and was facelifted in 1991 It was sold as the Vauxhalls Omegas in the UKs with the second generations which arrived in 1994 with a facelifts in late 1999.