### CONTEXT (Previous Events):
<system_output timestamp="576.142735">I: Extracting libattr1...
</system_output>
<system_output timestamp="576.152736">I: Extracting libaudit-common...
</system_output>
<system_output timestamp="576.161458">I: Extracting libaudit1...
</system_output>
<system_output timestamp="576.175595">I: Extracting libblkid1...
</system_output>
<system_output timestamp="576.204011">I: Extracting libbz2-1.0...
</system_output>
<system_output timestamp="576.219377">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="576.307728">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="576.681537">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="576.689853">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="577.597772">I: Extracting libcom-err2...
I: Extracting libcrypt1...
I: Extracting libdb5.3...
I: Extracting libdebconfclient0...
I: Extracting libext2fs2...

... [TRUNCATED 14 LINES] ...

I: Extracting libpam-modules...
I: Extracting libpam-modules-bin...
I: Extracting libpam-runtime...
I: Extracting libpam0g...
</system_output>
<system_output timestamp="577.603069">I: Extracting libpcre2-8-0...
</system_output>
<system_output timestamp="577.645477">I: Extracting libseccomp2...
</system_output>
<system_output timestamp="577.659624">I: Extracting libselinux1...
</system_output>
<system_output timestamp="577.677644">I: Extracting libsemanage-common...
</system_output>

### TARGET LINE (Extract and Classify THIS Timestamp):
<system_output timestamp="577.687427">I: Extracting libsemanage2...
</system_output>

Answer: 577.687427, old event