In what year was the album “StrijderSysteem” released by Sjaak?

In what year was the album “StrijderSysteem” released by Sjaak?: The album “StrijderSysteem” was released in 2013 by Sjaak, featuring 7 tracks.
What is the most successful song from the album “StrijderSysteem” by Sjaak?: “Wat Is Er?!” is the biggest hit from the album “StrijderSysteem” by Sjaak.

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