The phrase "which has centred" is correct and usable in written English.
It can be used when referring to something that has focused or concentrated on a particular subject or theme.
Example: "The discussion, which has centred on climate change, has sparked a lot of interest among the attendees."
Alternatives: "which has focused" or "which has concentrated".
Hall also said he was not concerned by criticism of the film, which has centred on accusations that it glorifies a ruthless killer.
When it does, this may start to curb speculative interest in the housing market, which has centred on the buy-to-let private rental market.
National, which has centred its campaign on a record of stable economic growth, will hope to again form a government with support from a handful of tiny parties, the Maori Party, ACT and United Future, who between them are on course to win four seats, even if they secure enough of the party vote to form an absolute parliamentary majority and rule alone.
Rather than lead his party out of trouble, the election campaign in Scotland – which has centred on warnings that a vote for the SNP would keep Mr Cameron in power - has been a reverse of the campaign in England and Wales where Mr Miliband's reputation and standing has improved.
The campaign appears to be a response to criticism that under-30s are not engaged in thereferendum debates, which have centred on the economy and immigration.
The work marked a critical step forward from earlier methods, which had centred on motivational competitions and schools developed specifically around a STEM curriculum and yet had failed to expand and have an impact on large numbers of students.
The death in police custody on Sunday of a local reggae singer, Joseph Reginald Topize - known as Kaya - sparked the riots, which have centred mainly on poor parts of the island inhabited by the country's African Creole minority.
The labour ministry asked international law firm DLA Piper to explore the allegations, which had centred on some workplaces in a $54bn£33bnbn) development known as Lusail City, 15 kilometres north of Doha.
In other domestic news, former national police commissioner Jackie Selebi was sentenced to 15 years in prison for corruption, which had centred on his relationship with convicted drug dealer Glen Agliotti.
Responding to the unfolding allegations of assault in the US entertainment industry, which have centred around Harvey Weinstein and Amazon Studios head Roy Price, the journalist tweeted: "Interesting that punishment often seems swift in the US corporate, media and entertainment space, but not in Australia".
We discuss the photograph of a child standing on the warm cooking stove, on which much debate has centred in the history of Washday.
