### CONTEXT (Previous Events):
<user_input timestamp="84.076466">r</user_input>
<system_output timestamp="84.088638">r</system_output>
<user_input timestamp="84.244057">u</user_input>
<system_output timestamp="84.253287">u</system_output>
<user_input timestamp="84.54115">b</user_input>
<system_output timestamp="84.547652">b</system_output>
<user_input timestamp="84.752585"> </user_input>
<system_output timestamp="84.758825"> </system_output>
<user_input timestamp="86.194202">b</user_input>
<system_output timestamp="86.196391">b</system_output>
<user_input timestamp="86.304233">i</user_input>
<system_output timestamp="86.311863">i</system_output>
<user_input timestamp="86.581423">n</user_input>
<system_output timestamp="86.601465">n</system_output>

### TARGET LINE (Extract and Classify THIS Timestamp):
<user_input timestamp="86.750099">a</user_input>

Answer: 86.750099, old event