### CONTEXT (Previous Events):
<system_output timestamp="273.959423">Unpacking python3.11 (3.11.2-6+deb12u2) ...
</system_output>
<system_output timestamp="274.048573">Selecting previously unselected package libpython3-stdlib:i386.
</system_output>
<system_output timestamp="274.05031">Preparing to unpack .../libpython3-stdlib_3.11.2-1+b1_i386.deb ...
</system_output>
<system_output timestamp="274.050832">Unpacking libpython3-stdlib:i386 (3.11.2-1+b1) ...
</system_output>
<system_output timestamp="274.093711">Setting up python3-minimal (3.11.2-1+b1) ...
</system_output>
<system_output timestamp="274.340416">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="274.345472">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="274.347454">... [TRUNCATED TO SAVE SPACE] ...</system_output>
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<system_output timestamp="274.35431">(Reading database ... 20%
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<system_output timestamp="274.36146">(Reading database ... 100%
(Reading database ... 13852 files and directories currently installed.)
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### TARGET LINE (Extract and Classify THIS Timestamp):
<system_output timestamp="274.363187">Preparing to unpack .../00-python3_3.11.2-1+b1_i386.deb ...
</system_output>

Answer: 274.363187, old event