With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Eddie Redmayne appeared in a movie that Justin Chadwick directed.
text_B: The Sheboygan Lighthouse stood on North Point in Sheboygan , Wisconsin .. Improvements to the harbor rendered it obsolete , and it was deactivated in the early 20th century .. The much altered second light survives as a private residence .
not_related.