code: def lamb_and_children_idxs(vectorizer_and_dtm):
      vec, _ = vectorizer_and_dtm
      idx_lamb = [
          id_
          for term, id_ in vec.vocabulary_terms.items()
          if term == "lamb"
      ][0]
      idx_children = [
          id_
          for term, id_ in vec.vocabulary_terms.items()
          if term == "children"
      ][0]
      return idx_lamb, idx_children
  
imports: import pytest
  import numpy
  from scipy.sparse import coo_matrix
  from textacy import extract, representations
label_desc: Use image node_id 6 for calling a global function with example usage: lamb_and_children_idxs(vectorizer_and_dtm) and returns: idx_lamb,  idx_children