### CONTEXT (Previous Events):
<system_output timestamp="3507.075933">Preparing to unpack .../16-squashfs-tools_1%3a4.5.1-1_i386.deb ...
</system_output>
<system_output timestamp="3507.0767">Unpacking squashfs-tools (1:4.5.1-1) ...
</system_output>
<system_output timestamp="3507.149683">Selecting previously unselected package dracut-squash.
</system_output>
<system_output timestamp="3507.151927">Preparing to unpack .../17-dracut-squash_059-4_all.deb ...
</system_output>
<system_output timestamp="3507.155267">Unpacking dracut-squash (059-4) ...
</system_output>
<system_output timestamp="3507.185111">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="3507.187223">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="3507.187629">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="3507.231808">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="3507.234091">Preparing to unpack .../19-zstd_1.5.4+dfsg2-5_i386.deb ...
</system_output>
<system_output timestamp="3507.234448">Unpacking zstd (1.5.4+dfsg2-5) ...
</system_output>
<system_output timestamp="3507.422561">Selecting previously unselected package fai-client.
</system_output>
<system_output timestamp="3507.424716">Preparing to unpack .../20-fai-client_6.0.3+deb12u1_all.deb ...
</system_output>
<system_output timestamp="3507.42539">Unpacking fai-client (6.0.3+deb12u1) ...
</system_output>

### TARGET LINE (Extract and Classify THIS Timestamp):
<system_output timestamp="3507.506524">Selecting previously unselected package libparse-recdescent-perl.
Preparing to unpack .../21-libparse-recdescent-perl_1.967015+dfsg-4_all.deb ...
Unpacking libparse-recdescent-perl (1.967015+dfsg-4) ...
</system_output>

Answer: 3507.506524, old event