With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Sam Worthington hasn't been in movies.
text_B: Maine Central Railroad 470 is a retired 4-6-2 -LRB- Pacific -RRB- steam locomotive , now owned by New England Steam Corporation .. 4-6-2. 4-6-2. Maine Central Railroad. Maine Central Railroad. It is currently located displayed in the City of Waterville , Maine .
not_related.