### CONTEXT (Previous Events):
<user_input timestamp="17.598667">P</user_input>
<system_output timestamp="17.618339">P</system_output>
<user_input timestamp="17.84305">H</user_input>
<system_output timestamp="17.864902">H</system_output>
<user_input timestamp="18.171168">	</user_input>
<system_output timestamp="18.212423">YS </system_output>
<user_input timestamp="18.684759">
</user_input>
<system_output timestamp="18.707009">
[?2004l
</system_output>
<system_output timestamp="18.873179">sudo: unable to resolve host faiserver: Name or service not known
</system_output>
<system_output timestamp="18.879074">[sudo] password for demo: </system_output>
<user_input timestamp="21.147396">f</user_input>
<user_input timestamp="21.246818">a</user_input>
<user_input timestamp="21.267084">i</user_input>
<user_input timestamp="21.469843">
</user_input>

### TARGET LINE (Extract and Classify THIS Timestamp):
<system_output timestamp="21.48722">
</system_output>

Answer: 21.48722, new event