pan><span class="special">&gt;</span> <span class="identifier">claudias_absence_times</span><span class="special">(</span><span class="identifier">claudias_seminar</span><span class="special">);</span>
    <span class="identifier">claudias_absence_times</span> <span class="special">+=</span> <span class="identifier">claudias_vacation</span><span class="special">;</span>

    <span class="comment">// All the absence times have to subtracted from the map of her working times
</span>    <span class="identifier