With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Chelsea F.C. is a team which has won all 3 UEFA club competitions.
text_B: A referendum on the construction of public buildings was held in Liechtenstein on 7 March 1993 .. Liechtenstein. Liechtenstein. Voters were asked whether they approved of the construction of a new Landtag building and some other buildings .. Landtag. Landtag of Liechtenstein. The proposal was rejected by 79.6 % of voters .
not_related.