Question: Do Lê Sỹ Mạnh and Alexander (Byzantine Emperor) share the same nationality?
Sentence (from "Lê Sỹ Mạnh"): In September 2017 he was involved in an incident with Vietnam national football team goalkeeper Đặng Văn Lâm, who after being threatened by Lê Sỹ Mạnh, ran away and injured his ankle.
Relevant evidence: No