Original sentence: Controversial figures, both Mečiar and Slota headed the government coalition between the years of 1994 to 1998 during which Slovakia endured substantial international isolation as a result of the Mečiar-headed government’s conduct and policies.It's worth noting that at that time, Fico, as a member of the opposition, was one of Mečiar's and Slota's most vocal critics.Slovakia's EU and NATO entry negotiations came to a halt due to numerous alleged constitutional and human rights violations and allegedly unlawful privatization transactions (widespread cronyism and subsequent massive asset stripping)