input: Write a function to identify the words that contain more than one vowel in a given sentence using regular expressions. If the sentence is empty, return an empty list.
  assert find_vowel_words("The quick brown fox jumped over the lazy dog.")==['quick', 'brown', 'jumped', 'over', 'lazy']
  assert find_vowel_words("Hello world")==['world']
  assert find_vowel_words("Python is great")==['great']
  assert find_vowel_words("")==[]
  assert find_vowel_words("aeiou")==[]
output: def find_vowel_words(sentence):
      import re
      if not sentence:
          return []
      words = re.findall(r'\b\w+\b', sentence)
      vowel_words = [word for word in words if len(re.findall(r'[aeiouAEIOU]', word)) > 1]
      return vowel_words