input: Write a function to identify the longest word in a sentence. The function should return the longest word found in the sentence.
  assert find_longest_word("The rain in Spain stays mainly in the plain.") == "mainly"
  assert find_longest_word("Python is a versatile and powerful language.") == "versatile"
  assert find_longest_word("Development team needs more collaborative space.") == "collaborative"
  assert find_longest_word("Coding makes life interesting.") == "interesting"
  assert find_longest_word("") == ""
output: def find_longest_word(sentence):
      words = sentence.split()
      if not words:
          return ""
      longest_word = max(words, key=len)
      return longest_word