With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Helen Keller taught that deaf people are capable of doing things.
text_B: H25 or H-25 may refer to  :. Piasecki H-25 , a helicopter formerly operated by the Canadian , French and United States militaries. Piasecki H-25. Piasecki H-25. HMS H25 , a United Kingdom Royal Navy submarine which saw service during World War I. HMS H25. HMS H25. and also  :. H25 , a medium-format camera made by Danish company Phase One as part of their H-series line. H-series. Phase One ( company )#H Series. Senile cataract ICD-10 code. Senile cataract. Senile cataract
not_related.