code: def sent2labels(sentence):
      """extract labels in a sentence
  
      :type sentence: list of token, each token is a list of tag
      :return a list contains labels in sentence
  
      Example:
          sentence = [("Have", "V"), ("a", "D"), ("nice", A"), (day, "N")
      """
      return [label for token, label in sentence]
  
file_path: underthesea/underthesea/feature_engineering/feature.py
imports: import re
  from os.path import join, dirname
  from underthesea.corpus import DictionaryLoader
label_desc: Use image node_id 10 for calling a global function with example usage: sent2labels(sentence) and returns: unknown