Complex sentence: As early as 2007, WebKit had announced its intention to include CSS animation, transitions and transforms as features of WebKit, and announced the implementation of both implicit and explicit animation through CSS in February 2009.
Split into simpler sentences: As early as 2007, WebKit had announced its intention to include CSS animation, transitions, and transforms as features of WebKit. It also announced the implementation of both implicit and explicit animation through CSS in February 2009.