sentences:  On 25 July 2017, Adobe announced that both the distribution and support of Flash will cease by the end of 2020.On 14 February 2011, the W3C extended the charter of its HTML Working Group with clear milestones for HTML5.In May 2011, the working group advanced HTML5 to "Last Call", an invitation to communities inside and outside W3C to confirm the technical soundness of the specification.