input: Write a function to identify the words in a given sentence that contain more than one vowel. If no such words exist, return an empty list. Use regular expressions to match the words.
  assert identify_words("The quick brown fox jumped over the lazy dog.")==['quick', 'brown', 'jumped', 'over', 'lazy']
  assert identify_words("A cat is playing with a ball.")==['playing']
  assert identify_words("Sky is blue.")==[]
  assert identify_words("")==[]
output: import re
  
  def identify_words(sentence):
      words = re.findall(r'\b\w+\b', sentence)
      result = [word for word in words if len(re.findall(r'[aeiouAEIOU]', word)) > 1]
      return result