training for the opera <i><a href="https://en.wikipedia.org/wiki/Einstein_on_the_Beach" class="extiw" title="en:Einstein on the Beach">Einstein on the Beach</a></i>, Dortmund, 11 April
<a href="//commons.wikimedia.org/wiki/User:Sky_xe" title="User:Sky xe">Sky xe</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>