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The BBC first heard their story a decade earlier when they were filmed at a refugee centre in the city of Oberhausen.

Near Oberhausen's main park, Georg, 66, says he gets on with people from all backgrounds but worries about cases of "radicalisation."

He mourns what he sees a general decline in Oberhausen, pointing to because of ageing infrastructure and a lack of investment.

Before Europe's migration crisis, Oberhausen was already a multicultural city.

Local government figures show that in 2010, 22% of people in Oberhausen were either not born as German citizens or had one immigrant parent.