Original sentence: ) and one of  the oldest civilization of Europe.Greece: Ancient Greeks, a tribal  group (Athenians, Spartans, Peloponnesians, Thessalians, Macedonians etc
Edited sentence: ) and probably the oldest civilization of Europe.Greece:Greeks, an ancient ethnic group(Athenians,Spartans,Peloponnesians,Thracians,Thessalians,Macedonians etc