With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Doctor Who is produced by CNN.
text_B: Andrej Martin and Hans Podlipnik were the defending champions but chose to participate with different partners .. Hans Podlipnik. Hans Podlipnik. Andrej Martin. Andrej Martin. Martin chose to participate with Tomasz Bednarek , while Podlipnik chose to partner with Lukas Dlouhy .. Lukas Dlouhy. Lukas Dlouhy. Tomasz Bednarek. Tomasz Bednarek. Martin and Podlipnik faced each other in the semifinals , with Podlipnik advancing to the final .. Podlipnik failed to defend his title , losing to Sander Arends and Tristan-Samuel Weissborn 7 -- 6 -LRB- 10 -- 8 -RRB- , 6 -- 7 -LRB- 4 -- 7 -RRB- , -LSB- 10 -- 5 -RSB- in the final .. Sander Arends. Sander Arends. Tristan-Samuel Weissborn. Tristan-Samuel Weissborn
not_related.