I want to know the answer to the following question:
When did a tribe of Slavs arrive in Central Europe?
All the background I'm provided with is that "The ninth century brought the state of Great Moravia, whose first ruler (Rastislav of Moravia) invited Byzantine ruler Michael III to send missionaries in an attempt to reduce the influence of East Francia on religious and political life in his country.". Is that enough to answer the question?
Answer: no