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In this picture taken on September 3, 2017, Analyn Tapil (L), a member of the "Unsung Heroes" choir and Filipina domestic worker, shows a photograph with her two sons Lyndon (C) and Loren (R) on a mobile phone, after a practice session inside a kindergarten school's classroom in Hong Kong. Each Sunday, a choir of Filipina domestic workers in Hong Kong gathers to sing songs that remind them of the children they left back home. Known as the "Unsung Heroes", what began as a group of shy performers now regularly take the stage around Hong Kong and feature in a new documentary about the lives of the city's maids, known locally as "helpers". / AFP PHOTO / DALE DE LA REY / To go with AFP story Hong Kong-Philippines-music-social-film-maids , Feature by Laura Mannering (Photo credit should read DALE DE LA REY/AFP/Getty Images)

In this picture taken on September 3, 2017, Analyn Tapil (L), a member of the "Unsung Heroes" choir and Filipina domestic worker, shows a photograph with her two sons Lyndon (C) and Loren (R) on a mobile phone, after a practice session inside a kindergarten school's classroom in Hong Kong.
Each Sunday, a choir of Filipina domestic workers in Hong Kong gathers to sing songs that remind them of the children they left back home. Known as the "Unsung Heroes", what began as a group of shy performers now regularly take the stage around Hong Kong and feature in a new documentary about the lives of the city's maids, known locally as "helpers". / AFP PHOTO / DALE DE LA REY / To go with AFP story Hong Kong-Philippines-music-social-film-maids , Feature by Laura Mannering        (Photo credit should read DALE DE LA REY/AFP/Getty Images)