<s>[INST] <<SYS>>
You are an expert in regular expressions (regex)
<</SYS>>

Find a regex pattern that matches the following string:
1996%7B10%7B21 05:20:25.472Z [/INST] pattern:
\d{4}%7B\d{2}%7B\d{2}\ \d{2}:\d{2}:\d{2}\.\d{3}Z </s>