### CONTEXT (Previous Events):
<system_output timestamp="40489.33379">l</system_output>
<user_input timestamp="40489.73196">n</user_input>
<system_output timestamp="40489.748686">n</system_output>
<user_input timestamp="40489.869409">e</user_input>
<system_output timestamp="40489.875681">e</system_output>
<user_input timestamp="40490.09965">t</user_input>
<system_output timestamp="40490.104528">t</system_output>
<user_input timestamp="40490.390658">,</user_input>
<system_output timestamp="40490.401952">,</system_output>
<user_input timestamp="40490.62309"> </user_input>
<system_output timestamp="40490.634418"> </system_output>
<user_input timestamp="40491.220766">a</user_input>
<system_output timestamp="40491.225033">a</system_output>
<user_input timestamp="40491.629609">n</user_input>

### TARGET LINE (Extract and Classify THIS Timestamp):
<system_output timestamp="40491.647263">n</system_output>

Answer: 40491.647263, old event