Complex sentence: The 1965 Americans were little changed, but were advertised as "The Sensible Spectaculars" as part of Roy Abernethy's strategy for AMC to shed its "economy car" reputation and take on the domestic Big Three automakers in new market segments.
Split into simpler sentences: The 1965 Americans were little changed, but were advertised as "The Sensible Spectaculars". This was part of Roy Abernethy's strategy for AMC to shed its "economy car" reputation and take on the domestic Big Three automakers in new market segments.