Complex sentence: Significant 15 metre types include the ASW 20 (1977), Ventus (1980), LS6 (1983), Ventus-2 (1994) and ASW-27 (1995).
Split into simpler sentences: Significant 15 metre types include the ASW 20 (1977), Ventus (1980), LS6 (1983). Modern contenders include the Ventus-2 (1994) and the ASW-27 (1995).