### CONTEXT (Previous Events):
<system_output timestamp="275.831549">(Reading database ... 5%
</system_output>
<system_output timestamp="275.832981">(Reading database ... 10%
</system_output>
<system_output timestamp="275.83488">(Reading database ... 15%
</system_output>
<system_output timestamp="275.8377">(Reading database ... 20%
</system_output>
<system_output timestamp="275.839202">(Reading database ... 25%
</system_output>
<system_output timestamp="275.840322">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="275.841766">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="275.843519">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="275.84797">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="275.901469">Selecting previously unselected package openssl.
</system_output>
<system_output timestamp="275.904011">Preparing to unpack .../001-openssl_3.0.14-1~deb12u1_i386.deb ...
Unpacking openssl (3.0.14-1~deb12u1) ...
</system_output>
<system_output timestamp="276.28918">Selecting previously unselected package ca-certificates.
</system_output>
<system_output timestamp="276.291806">Preparing to unpack .../002-ca-certificates_20230311_all.deb ...
</system_output>
<system_output timestamp="276.29264">Unpacking ca-certificates (20230311) ...
</system_output>

### TARGET LINE (Extract and Classify THIS Timestamp):
<system_output timestamp="276.499027">Selecting previously unselected package gettext-base.
</system_output>

Answer: 276.499027, old event