With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Doctor Who first aired in the 1960s.
text_B: Mohamed Hechmi Hamdi , also spelled Mohamed el Hachmi El-Hamdi , Hechmi Haamdi , or Hachmi Hamdi is a Tunisian journalist , media entrepreneur and politician , who lives in London .. London. London. He is founder and owner of the oppositional Al Mustakillah TV channel .. Al Mustakillah. Al Mustakillah ( TV channel ). After the Tunisian Revolution in 2011 he founded the `` Popular Petition '' party later renamed to Current of Love .. Current of Love. Current of Love. Tunisian Revolution. Tunisian Revolution
not_related.