Provide the theme summaries for the following conversation: 

Mia: We should collect some money for this family
Mia: I can't stop thinking about their problems
Lene: yes, and they were so hospitable
Terry: I think we could organise a little street-funding in Berlin
Terry: and then just send them the money
Peter: But can one collect money just like this?
Mia: I doubt. One has to register an organisation
Mia: otherwise people would just embezzle money all the time

Summary: 
Mia, Lene, Terry and Peter are planning to raise some money for this family. It is necessary to register an organization to be able to raise money, as Mia points out.