With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Diego Costa fails to play for English club Chelsea.
text_B: Diego da Silva Costa -LRB- -LSB- ˈdjeɣo ða ˈsilβa ˈkosta -RSB- , -LSB- ˈdʒjeɡu dɐ ˈsiwvɐ ˈkɔstɐ -RSB- ; born 7 October 1988 -RRB- , is a professional footballer who plays as a striker for English club Chelsea and the Spain national team .. Chelsea. Chelsea F.C.. Spain. Spain national football team. footballer. Association football. striker. Forward ( association football )#Striker. Spain national team. Spain national football team. He has been described by pundits as a talented striker whose main attributes are his physicality , goalscoring and ability to keep possession .. striker. Forward ( association football )#Striker. Costa has been criticised and punished for several confrontations with opponents .. He began his career with Braga and Penafiel in Portugal , and was signed by Atletico Madrid in 2007 .. Braga. S.C. Braga. Penafiel. F.C. Penafiel. Atletico Madrid. Atletico Madrid. He was loaned back to Braga , and then to Celta de Vigo and Albacete before being sold to Real Valladolid in 2009 .. Braga. S.C. Braga. Celta. Celta de Vigo. Albacete. Albacete Balompie. Valladolid. Real Valladolid. Celta de Vigo. Celta de Vigo. Real Valladolid. Real Valladolid. He returned to Atletico the following season and went on to play a key role in their attack , scoring 27 goals as they won the league title in 2014 , and then joined Chelsea for # 32 million .. Chelsea. Chelsea F.C.. won the league title in 2014. 2013–14 La Liga. He scored 21 goals in his first season in England , winning the Premier League and League Cup .. Premier League. Premier League. League Cup. Football League Cup. Internationally , Costa played twice for his native Brazil in 2013 , but later declared his desire to represent Spain , having been granted Spanish citizenship in September 2013 .. Brazil. Brazil national football team. Spain. Spain national football team. Spanish citizenship. Spanish nationality law. He made his debut for his adopted nation in March 2014 , and represented them at the 2014 FIFA World Cup .. 2014 FIFA World Cup. 2014 FIFA World Cup
related.