{"text":"Challenge Set A:\nIn the realm of cryptic communications, one may encounter emails such as alice.smith+promo@agency.co.uk, john_doe.42@example-domain.com, not_to_be_matched.email@fail..com and variations that look similar but are invalid (e.g., alice.smithpromo@agency.co.uk missing the plus).\n\nFor contact numbers, valid formats include +1 (800) 555-0199 and 800-555-0199; note that 1800-555-0199, while similar, is not acceptable.\n\nDates appear in various international styles: 2021-12-31, 31/12/2021, and 2021.12.31 are correct, whereas 2021/12/31 or 31-12-2021 should be excluded.\n\nDigital records also contain properly tagged entries like <file>XYZ-2023</file> (with matching case), while variants such as <file>XYZ-2023<...(truncated)","targetItems":["alice.smith+promo@agency.co.uk","john_doe.42@example-domain.com","+1 (800) 555-0199","800-555-0199","2021-12-31","31/12/2021","2021.12.31","<file>XYZ-2023</file>","$2,345.67","€12.345,67","#Sec-456B","AB-123-AB"]}