I want to know the answer to the following question:
Who was the fourth Karmapa Lama?
All the background I'm provided with is that "Rolpe Dorje, 4th Karmapa Lama (1340–1383) rejected the Hongwu Emperor's invitation, although he did send some disciples as envoys to the court in Nanjing.". Is that enough to answer the question?
Answer: yes