Question: What do both Aealo and Rotting Christ have in common?
Related documents: [0]  [DOC] Aealo is the tenth full-length album by Greek extreme metal band Rotting Christ. It was released on 15 February 2010 via Season of Mist. [END] 
[1]  [DOC] Rotting Christ is a Greek extreme metal band formed in 1987. They are noted for being one of the first black metal bands within this region, as well as a premier act within the European underground metal scene. They are also responsible for creating the signature Greek black metal sound prevalent in the early 1990s. [END] 
Answer: 
Greek extreme metal band
Greek extreme metal band