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"""Simple regex-based entity extraction for demo purposes."""
import re
def extract_entities(text):
entities = {}
emails = re.findall(r"\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}\b", text)
dates = re.findall(r"\b\d{1,2}[/-]\d{1,2}[/-]\d{2,4}\b", text)
amounts = re.findall(r"\b\$?\d{1,3}(?:[.,]\d{3})*(?:[.,]\d+)?\s?(?:USD|INR|EUR|Rs|\$)?\b", text)
entities['emails'] = list(dict.fromkeys(emails))
entities['dates'] = list(dict.fromkeys(dates))
entities['amounts'] = list(dict.fromkeys([a.strip() for a in amounts if a.strip()]))
return entities
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