code: def extract_returned_text(vector_store_response: List) -> List:
      # todo: this is a hack, we need to fix this so it works with multiple context ie top_k>1
      # todo handle empty response
      return [doc.page_content for doc in vector_store_response][0]
  
imports: import ast
  from collections import defaultdict
  from typing import List
  import nltk
  import pandas
  from nltk import word_tokenize
  from nltk.translate.bleu_score import sentence_bleu
  from nltk.translate.meteor_score import meteor_score
  from rouge_score import rouge_scorer
  from scipy.spatial import distance
  from mindsdb.integrations.handlers.writer_handler.settings import WriterHandlerParameters
  from mindsdb.utilities import log
label_desc: Use image node_id 6 for calling the WriterEvaluator obj's underlying member method code with example usage: obj.extract_returned_text(vector_store_response) and returns: unknown