With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Dean Martin was an Italian-American.
text_B: A by-election was held for the South Australian House of Assembly seat of Alexandra on 9 May 1992 .. South Australian House of Assembly. South Australian House of Assembly. Alexandra. Electoral district of Alexandra. This was triggered by the resignation of former state Liberal MHA Ted Chapman .. Liberal. Liberal Party of Australia. Ted Chapman. Ted Chapman ( politician ). The seat had been retained by the Liberals since it was created and first contested at the 1973 state election .. 1973 state election. South Australian state election, 1973. The by-election was held on the same day as the Kavel state by-election .. Kavel state by-election. Kavel state by-election, 1992
not_related.