Complex sentence: In the mid- 1970s FedEx adopted the hub and spoke model for overnight package delivery, and after the airline industry was deregulated in 1978, Delta's hub and spoke paradigm was adopted by several other airlines.
Split into simpler sentences: In the mid- 1970ss FedEx adopted the hub and spoke model for overnight package delivery. After the airline industry was deregulated in 1978, Delta's hub and spoke paradigm was adopted by several other airlines.