With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Khal Drogo was introduced in March of 1996.
text_B: Martin County Schools is the public school district for Martin County , North Carolina .. North Carolina. North Carolina. public. Public school ( government funded ). school district. school district. The district serves the entire county and there are no other districts within the county .
not_related.