Complex sentence: "Dagga" is a South African colloquial term for cannabis, and the party's platform is based around the legalisation of cannabis, which the party believes would provide numerous socio-economic benefits to South Africa.
Split into simpler sentences: Dagga is a South African colloquial term for cannabis, the legalisation of which forms the core of the party's platform. The party believes cannabis legalisation would confer numerous socio-economic benefits to South Africa.