{"text":"System Log Start:\nUser credentials: complex.email+regex_challenge@sub.company-domain.co.uk logged in successfully.\nFor support, refer to the backup contact: user_99.test-email@very-long-subdomain.example.io, but note that simple_email@.com is not valid.\nEmergency contact: +44 (020) 7946-0958 ext.221 should be used only after hours; alternatively, dial 1-800-555-0199 for immediate assistance.\nImportant Dates:\n- Scheduled maintenance on 2023-12-31.\n- Board meeting set for March 3rd, 2021.\n- Anniversary celebrated on 03/03/21.\nInvalid date formats like 31/12/2023 or 2023/12/31 are noted, but not processed.\nDocumentation ID: ID# ZXY-999-XY...(truncated)","targetItems":["complex.email+regex_challenge@sub.company-domain.co.uk","user_99.test-email@very-long-subdomain.example.io","+44 (020) 7946-0958 ext.221","1-800-555-0199","2023-12-31","March 3rd, 2021","03/03/21","ID# ZXY-999-XYZ","(#a1b2c3)","#ABCDEF","#123abc","https://regex-challenge.org/test?mode=advanced"]}