Question: Which arena, once known as the "North Greenwich Arena", regularly hosts the Country to Country music festival?
Sentence (from "The O2 Arena"): The O2 Arena (temporarily the sponsor-neutral "North Greenwich Arena", during the 2012 Summer Olympics and 2012 Summer Paralympics), is a multi-purpose indoor arena located in the centre of The O2 entertainment complex on the Greenwich Peninsula in south-east London.
Relevant evidence: Yes