Question: When  did the revolutionary wave which  Syria enjoyed an improvement in relations with several of the states in its region in the 21st century, prior to began 
Sentence (from "21st Century (Groove Coverage album)"): Compared to Groove Coverage's previous albums, "7 Years and 50 Days" and "Covergirl", this album contains much more pop music such as "21st Century Digital Girl", "What You C is What You Get", and a rock song, titled "Rock".
Relevant evidence: No