With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Arrow got a sixth season.
text_B: This was the first edition of the tournament .. Hsieh Cheng-peng and Peng Hsien-yin won the title after defeating Andre Begemann and Aliaksandr Bury 3 -- 6 , 6 -- 4 , -LSB- 10 -- 7 -RSB- in the final .. Hsieh Cheng-peng. Hsieh Cheng-peng. Peng Hsien-yin. Peng Hsien-yin. Andre Begemann. Andre Begemann. Aliaksandr Bury. Aliaksandr Bury
not_related.