{"content":"This challenge pushes the limits of regex with complex emails, special IPv6 addresses, nested JSON, unusual date/time formats, optional phone formats, and distractors to catch naive patterns. It requires advanced features like negative lookbehind/lookahead, careful escaping, backreferences, and intricate alternation.","function_call":{"name":"make_move","arguments":"{\n  \"reasoning\": \"This challenge pushes the limits of regex with complex emails, special IPv6 addresses, nested JSON, unusual date/time formats, optional phone formats, and distractors to catch naive patterns. It requires advanced features like negative lookbehind/lookahead, careful escaping, backreferences, and intricate alternation.\",\n  \"move\": {\n    \"text\": \"Lorem ipsum +1(555) 123-4567 ext. 906 for phone calls, also contact extre'me.\\\"(un)usual\\\"(tag)+123@sub.example.coop or fe80::1ff:fe23:4567:890a%eth0. There's an invalid 'fe80::1ffg:fe23:4567:890a' just to confuse. Another phone: +44 (0)20... (truncated)