With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Dragon Ball has been made into card games.
text_B: Frantisek Nusl -LRB- -LSB- ˈfrantɪʃɛk ˈnuʃl -RSB- ; 3 December 1867 , in Jindrichuv Hradec -- 17 September 1951 , in Prague -RRB- was a Czech astronomer and mathematician .. Jindrichuv Hradec. Jindrichuv Hradec. Prague. Prague. Czech. Czech people. astronomer. astronomer. mathematician. mathematician
not_related.