Solved by David_Espinosa in post #4 
              
              
                Hello @markdaoust , 
Thanks for your time and comments. 
Sorry for not adding my feedback, I solved this issue by 2022-01-26. Here is my implementation: 
# This data will be adapted on 'TextVectorization' layer, later on
list_of_lists = [
    ["Python", "Java", "C++"],
    ["Netbeans", "Django"],
  …