With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Scabies is a disease.
text_B: Prisoner Zero is an Australian animated children 's sci-fi , action-adventure series produced by Planet 55 Studios .. It follows the adventures of Tag and Gem and their mysterious friend Prisoner Zero .. Tag and Gem have a mission to free those enslaved across the cosmos from the evil Imperium , led by General Vykar .
not_related.