Aliens — Refugees — Definition — Fear of persecution — Political opinions — Right to asylum on grounds of political persecution — Whether persecution must be attributable to the State — Whether sufficient that persecution emanates from State-like entity — Whether any requirement of organized and stable territorial authority — Disintegration of State authority during civil war — Whether party to civil war capable of committing political persecution within core territory over which its authority extends — Whether continuing external military threat necessarily excluding existence of internal State-like authority capable of committing persecution — The law of the Federal Republic of Germany