TASK DEFINITION: In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.
PROBLEM: Successive invasions of Germanic tribes finalized the decline of the Western Roman Empire in the 5th century , while the Eastern Roman Empire persisted throughout the Middle Ages , in a state called the Roman Empire by its citizens , and labelled the Byzantine Empire by later historians .

SOLUTION: Successive invasions of Germanic tribes meant the end of the Western Empire in the 5th century , but the Eastern Empire persisted throughout the Middle Ages as the Byzantine Empire .

PROBLEM: Interpretatio graeca ( Latin , " Greek translation " ) or " interpretation by means of Greek models " is a discourse used to interpret or attempt to understand the mythology and religion of other cultures ; a comparative methodology using ancient Greek religious concepts and practices , deities , and myths , equivalencies , and shared characteristics .

SOLUTION: Interpretatio graeca ( Latin : " interpretation by means of Greek models " ) is a process by which the religious concepts and practices , deities , and myths of Ancient Greece were used to interpret or attempt to understand the mythology and religion of other cultures .

PROBLEM: The J1 League ( Japanese : J1リーク ゙ , Hepburn : J1 Ri ̄ gu ) or simply J1 is the top division of the Japan Professional Football League ( Japanese : 日本フ ゚ ロサッカーリーク ゙ , Hepburn : Nihon Puro Sakka ̄ Ri ̄ gu ) and the top professional association football J.League in Japan .

SOLUTION:
J1 League is the top grouping of the Japan Professional Football League ( 日本フ ゚ ロサッカーリーク ゙ , Nippon Puro Sakka ̄ Ri ̄ gu ) .