What is the fine-grained topic of the following text: A whole generation of South Africans were introduced to the town of Botrivier as the setting for their favourite TV series - ‘Nommer Asseblief’ (number please) and visitors used to insist on seeing the telephone exchange and meeting the characters from the soapie. Only return the topic.
South African TV series 'Nommer Asseblief' set in Botrivier.