With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Catherine Zeta-Jones' first role was in A Little Night Music.
text_B: Mighty Sounds is a ska and punk rock festival in the Czech Republic .. punk rock. punk rock. ska. ska. Czech Republic. Czech Republic. The festival first took place in 2005 , in the village of Olsi near Oparany , remaining at that location for its first five years , before moving to a disused airport in Tabor in 2010 .. Tabor. Tabor. Olsi. Olsi ( Tabor District ). Oparany. Oparany. In 2007 the festival attracted around 10,000 people , and in 2010 its attendance exceeded 12,000 people , making it one of the biggest festivals of its kind in Europe .
not_related.