With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Americans is a television show.
text_B: The Swan 112 RS was designed by German Frers and built by Nautor 's Swan and first launched in 1999 and was the largest boat the yard had produced at this time until introduction of the Swan 131 six years later .. German Frers. German Frers. Swan 131. Swan 131
not_related.