Table: village_slovenes_1951_1991
Columns: village_german
village_slovenian
number_of_peoople_1991
percent_of_slovenes_1991
percent_of_slovenes_1951

Question: What percentage of Slovenes lived in the village of Roach in 1951?
SQL: SELECT "percent_of_slovenes_1951" FROM village_slovenes_1951_1991 WHERE "village_german" = 'roach'