Complex sentence: As the first model developed by Lexus, the LS 400 debuted in September 1989 with the second generation debuting in November 1994, the LS 430 in January 2000, and the LS 460/LS 460 L series in 2006.
Split into simpler sentences: As the first model developed by Lexus, the LS 400 debuted in September 1989 with the second generation debuting in November 1994. The LS 430 debuted in January 2000 and the LS 460/LS 460 L series in 2006.