### CONTEXT (Previous Events):
<system_output timestamp="2559.235232">I: Configuring vim-common...
</system_output>
<system_output timestamp="2559.316233">I: Configuring libslang2:i386...
</system_output>
<system_output timestamp="2559.372122">I: Configuring libsigc++-2.0-0v5:i386...
</system_output>
<system_output timestamp="2559.401933">I: Configuring aptitude-common...
</system_output>
<system_output timestamp="2559.480328">I: Configuring libproc2-0:i386...
</system_output>
<system_output timestamp="2559.51983">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="2559.601911">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="2560.781194">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="2560.818523">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="2560.864433">I: Configuring libxtables12:i386...
</system_output>
<system_output timestamp="2560.899216">I: Configuring sensible-utils...
</system_output>
<system_output timestamp="2560.992443">I: Configuring procps...
</system_output>
<system_output timestamp="2561.115095">I: Configuring netbase...
</system_output>
<system_output timestamp="2561.161563">I: Configuring isc-dhcp-common...
</system_output>

### TARGET LINE (Extract and Classify THIS Timestamp):
<system_output timestamp="2561.225558">I: Configuring libkrb5-3:i386...
</system_output>

Answer: 2561.225558, old event