With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Tyrion Lannister is in a fantasy series.
text_B: Rolf Wiik -LRB- 30 January 1929 -- 9 August 2007 -RRB- was a Finnish fencer .. fencer. fencing. He competed at the 1952 , 1956 and 1960 Summer Olympics .. 1952 Summer Olympics. 1956 Summer Olympics. 1960 Summer Olympics. 1960 Summer Olympics
not_related.