I want to know the answer to the following question:
Tribes of Slavs were invading what provinces of the Eastern Empire?
All the background I'm provided with is that "Byzantine historiographers under Justinian I (527–565), such as Procopius of Caesarea, Jordanes and Theophylact Simocatta describe tribes of these names emerging from the area of the Carpathian Mountains, the lower Danube and the Black Sea, invading the Danubian provinces of the Eastern Empire.". Is that enough to answer the question?
Answer: yes