CREATE TABLE table_name_60 (percent_of_slovenes_1951 VARCHAR(255), number_of_people_1991 VARCHAR(255), village__german_ VARCHAR(255))
Which Percent of Slovenes 1951 has a Number of people 1991 larger than 8, and a Village (German) of plöschenberg?
    
SQL: SELECT percent_of_slovenes_1951 FROM table_name_60 WHERE number_of_people_1991 > 8 AND village__german_ = "plöschenberg"