### CONTEXT (Previous Events):
<system_output timestamp="63.357442">Building dependency tree... 0%
Building dependency tree... 0%
</system_output>
<system_output timestamp="63.4272">Building dependency tree... 50%
Building dependency tree... 50%
</system_output>
<system_output timestamp="63.640749">Building dependency tree... Done
Reading state information... 0% 
Reading state information... 0%
</system_output>
<system_output timestamp="63.64236">Reading state information... Done
</system_output>
<system_output timestamp="64.114897">The following packages were automatically installed and are no longer required:
</system_output>
<system_output timestamp="64.117205">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="64.160145">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<system_output timestamp="64.165087">... [TRUNCATED TO SAVE SPACE] ...</system_output>
<user_input timestamp="66.044052">s</user_input>
<system_output timestamp="66.046269">s</system_output>
<user_input timestamp="66.231664">u</user_input>
<system_output timestamp="66.235028">u</system_output>
<user_input timestamp="66.377108">d</user_input>
<system_output timestamp="66.381405">d</system_output>

### TARGET LINE (Extract and Classify THIS Timestamp):
<user_input timestamp="66.543898">o</user_input>

Answer: 66.543898, new event