Table schema:
CREATE TABLE table_name_60 (percent_of_slovenes_1951 VARCHAR, number_of_people_1991 VARCHAR, village__german_ VARCHAR)

Question: 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"