With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Krysten Ritter played a role on Veronica Mars on the Disney channel.
text_B: The US Post Office-Greenfield Main is a historic post office at 442 Main Street in Greenfield , Massachusetts .. post office. post office. The main two-story central portion of the building was built in 1915 , and features restrained Colonial Revival decorations , including a pilastered pediment surrounding a recessed arched entrance .. The building was expanded in 1939 , adding single story wings on each side .. It was listed on the National Register of Historic Places in 1985 , and included in the Main Street Historic District in 1988 .. Main Street Historic District. Main Street Historic District ( Greenfield, Massachusetts ). National Register of Historic Places. National Register of Historic Places
not_related.