### CONTEXT (Previous Events):
<system_output timestamp="635.609665">Get: 10 http://127.0.0.1:3142/ftp.de.debian.org/debian bookworm/main i386 python3-debianbts all 4.0.1 [12.2 kB]
</system_output>
<system_output timestamp="635.612677">Get: 11 http://127.0.0.1:3142/ftp.de.debian.org/debian bookworm/main i386 python3-certifi all 2022.9.24-1 [153 kB]
</system_output>
<system_output timestamp="635.633058">Get: 12 http://127.0.0.1:3142/ftp.de.debian.org/debian bookworm/main i386 python3-charset-normalizer all 3.0.1-2 [49.3 kB]
</system_output>
<system_output timestamp="635.635924">Get: 13 http://127.0.0.1:3142/ftp.de.debian.org/debian bookworm/main i386 python3-idna all 3.3-1+deb12u1 [41.0 kB]
</system_output>
<system_output timestamp="635.639026">Get: 14 http://127.0.0.1:3142/ftp.de.debian.org/debian bookworm/main i386 python3-urllib3 all 1.26.12-1 [117 kB]
</system_output>
<system_output timestamp="635.643421">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="635.647057">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="635.650759">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="635.661175">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="635.663912">Get: 19 http://127.0.0.1:3142/ftp.de.debian.org/debian bookworm/main i386 elpa-dpkg-dev-el all 37.9 [37.5 kB]
</system_output>
<system_output timestamp="635.67573">Get: 20 http://127.0.0.1:3142/ftp.de.debian.org/debian bookworm/main i386 dpkg-dev-el all 37.9 [3,504 B]
</system_output>
<system_output timestamp="635.677316">Fetched 1,428 kB in 0s (6,353 kB/s)
</system_output>
<system_output timestamp="635.749405">install_packages: executing  aptitude -R -d -o Aptitude::Log=/dev/null -o Aptitude::CmdLine::Ignore-Trust-Violations=yes -o APT::Get::AllowUnauthenticated=true -o Acquire::AllowInsecureRepositories=true -o DPkg::force-conflicts::=yes -o Dir::State=/usr/fai/mirror/aptcache/var/lib/apt -o Dir::Log=/usr/fai/mirror/aptcache/var/log/apt -o Dir::State::extended_states=/usr/fai/mirror/aptcache/var/lib/apt/lists/extended_states -o Dir::State::status=/usr/fai/mirror/aptcache/statefile -o Dir::Cache=/usr/fai/mirror/aptcache/var/cache/apt -o Dir::State=/usr/fai/mirror/aptcache/var/cache/apt -o Dir::Cache::Archives=/usr/fai/mirror/aptcache/var/cache/apt/archives -o Dir::Etc=/usr/fai/mirror/aptcache/etc/apt/ -o Dir::State::Lists=/usr/fai/mirror/aptcache/var/lib/apt/lists/ -y install fortunes-bofh-excuses
</system_output>
<system_output timestamp="635.797158">Reading package lists...
</system_output>

### TARGET LINE (Extract and Classify THIS Timestamp):
<system_output timestamp="636.021875">Building dependency tree...
</system_output>

Answer: 636.021875, old event