What is the fine-grained topic of the following text: The 1972 film 'A Day With SELNEC', describes the work of SELNEC (South East Lancashire and North East Cheshire Passenger Transport Executive) and was shown to audiences throughout Britain and also in North America and Europe. Only return the topic.
The 1972 film 'A Day With SELNEC' about South East Lancashire and North East Cheshire Passenger Transport Executive's work