With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: De Profundis was inscribed to Lord Alfred Douglas.
text_B: The Serbia national under-21 football team is the national under-21 football team of Serbia and is controlled by the Football Association of Serbia .. Football Association of Serbia. Football Association of Serbia. Serbia. Serbia. This team is for Serbian players aged 21 or under at the start of a two-year UEFA European Under-21 Football Championship campaign , so players can be , and often are , up to 23 years old .. UEFA. UEFA. UEFA European Under-21 Football Championship. UEFA European Under-21 Football Championship. Also in existence are teams for Under-20s -LRB- for non-UEFA tournaments -RRB- , Under-19s and Under 17s .. UEFA. UEFA. Under-19s. Serbia national under-19 football team. As long as they are eligible , players can play at any level , making it possible to play for the U21s , senior side and again for the U21s , as Matija Nastasic , Filip Đuricic , Lazar Markovic , and Aleksandar Mitrovic have done recently .. Matija Nastasic. Matija Nastasic. Filip Đuricic. Filip Đuricic. Lazar Markovic. Lazar Markovic. Aleksandar Mitrovic. Aleksandar Mitrovic ( footballer ). It is also possible to play for one country at youth level and another at senior level -LRB- providing the player is eligible -RRB- .. Nikola Drincic is a currently Montenegrin international and former Serbia U21 player .. Serbia. Serbia. Nikola Drincic. Nikola Drincic. Montenegrin. Montenegro national football team
not_related.