[WARNING] Could not convert TeX math '
  Vocabulary\ of\ entity\ 1 = V_1 \\
  Cardinality\ of\ the\ vocabulary\ of\ entity\ 1 = |V_1|
  ', rendering as TeX:
  Vocabulary\ of\ entity\ 1 = V_1 \\
  ^
  unexpected "C"
  expecting "%", "\\label", "\\nonumber" or whitespace
[WARNING] Could not convert TeX math '
  Vocabulary\ of\ entity\ 2 = V_2 \\
  Cardinality\ of\ the\ vocabulary\ of\ entity\ 2 = |V_1|
  ', rendering as TeX:
  Vocabulary\ of\ entity\ 2 = V_2 \\
  ^
  unexpected "C"
  expecting "%", "\\label", "\\nonumber" or whitespace
[WARNING] Could not convert TeX math '
  Common\ vocabulary = V_1 \cap V_2 \\
  Shared\ vocabulary = V_1 \cup V_2 \\
  Vocabulary\ only\ in\ V_1 = V_1 - V_2 \\
  Vocabulary\ only\ in\ V_2 = V_2 - V_1 \\
  Uncommon\ vocabulary = (V_1 \cup V_2) - (V_1 \cap V_2) = (V_1 - V_2) \cup (V_2 - V_1)
  ', rendering as TeX:
  Common\ vocabulary = V_1 \cap V_2 \\
  ^
  unexpected "S"
  expecting "%", "\\label", "\\nonumber" or whitespace
[WARNING] Could not convert TeX math '
  Jaccard\ index = J(V_1, V_2) = \frac{|V_1 \cap V_2|}{|V_1 \cup V_2|} \\
  Size\ relative\ Jaccard\ index = |V_1 \cap V_2| \times J(V_1, V_2) = 2 \frac{|V_1 \cap V_2|}{|V_1 \cup V_2|}
  ', rendering as TeX:
  Jaccard\ index = J(V_1, V_2) = \frac{|V_
  ^
  unexpected "S"
  expecting "%", "\\label", "\\nonumber" or whitespace