A protester blows a horn during a demonstration of the public sector workers called by trade unions on February 13, 2019 in Berlin. (Photo by Odd ANDERSEN / AFP)

Protester blow a horn during a demonstration of the public sector workers called by trade unions on February 13, 2019 in Berlin. (Photo by Odd ANDERSEN / AFP)

Protesters walk with flags during a demonstration of the public sector workers called by trade unions on February 13, 2019 in Berlin. (Photo by Odd ANDERSEN / AFP)

Protesters walk with a banner reading "Verbeamtung" (appointment as a tenured German civil servant) during a demonstration of the public sector workers called by trade unions on February 13, 2019 in Berlin. (Photo by Odd ANDERSEN / AFP)

A protester walks with a flag of the GEW Education and Science Workers' Union during a demonstration of the public sector workers called by trade unions on February 13, 2019 in Berlin. (Photo by Odd ANDERSEN / AFP)

Protesters walk with a banner of the GEW Education and Science Workers' Union during a demonstration of the public sector workers called by trade unions on February 13, 2019 in Berlin. (Photo by Odd ANDERSEN / AFP)

Protesters stand with flags of the GEW Education and Science Workers' Union in front of the Brandenburg Gate during a demonstration of the public sector workers called by trade unions on February 13, 2019 in Berlin. (Photo by Odd ANDERSEN / AFP)

Protesters walk with flags during a demonstration of the public sector workers called by trade unions on February 13, 2019 in Berlin. (Photo by Odd ANDERSEN / AFP)

A protester walks with a flag of the GEW Education and Science Workers' Union in front of the Brandenburg Gate during a demonstration of the public sector workers called by trade unions on February 13, 2019 in Berlin. (Photo by Odd ANDERSEN / AFP)

A protester walks with a sign reading "6 percent more- that is fair" during a demonstration of the public sector workers called by trade unions on February 13, 2019 in Berlin. (Photo by Odd ANDERSEN / AFP)

A protester holds a sign reading "My mother deserves it" during a demonstration of the public sector workers called by trade unions on February 13, 2019 in Berlin. (Photo by Odd ANDERSEN / AFP)

Protesters sign in the strike list during a demonstration of the public sector workers called by trade unions on February 13, 2019 in Berlin. (Photo by Odd ANDERSEN / AFP)

A protester holds a sign reading "6 percent-why not?" during a demonstration of the public sector workers called by trade unions on February 13, 2019 in Berlin. (Photo by Odd ANDERSEN / AFP)

A protester holds a sign reading "Hot Spot School" during a demonstration of the public sector workers called by trade unions on February 13, 2019 in Berlin. (Photo by Odd ANDERSEN / AFP)

A protester holds a sign depicting a bomb made of LEGO bricks reading "Best greetings from Berlin" during a demonstration of the public sector workers called by trade unions on February 13, 2019 in Berlin. (Photo by Odd ANDERSEN / AFP)

Protesters hold a banner reading "10 years of empty promises" during a demonstration of the public sector workers called by trade unions on February 13, 2019 in Berlin. (Photo by Odd ANDERSEN / AFP)

Protesters stand with flags of the GEW Education and Science Workers' Union in front of the Brandenburg Gate during a demonstration of the public sector workers called by trade unions on February 13, 2019 in Berlin. (Photo by Odd ANDERSEN / AFP)

A protester holds a flag of the GEW Education and Science Workers' Union in front of the Brandenburg Gate during a demonstration of the public sector workers called by trade unions on February 13, 2019 in Berlin. (Photo by Odd ANDERSEN / AFP)