With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Jackie Evancho's middle name is Marie.
text_B: Line 6 of the Tianjin Metro a rapid transit line running from semi-circular from north-east to south-east Tianjin .. Tianjin Metro. Tianjin Metro. Tianjin. Tianjin. rapid transit. rapid transit. It was opened on 6 August 2016 .. The line was later extended on 31 December 2016 .. The line is currently 26 km long and has 24 stations of which are underground .
not_related.