table: 1-10797463-1
columns: Village (German), Village (Slovenian), Number of people 1991, Percent of Slovenes 1991, Percent of Slovenes 1951
Q: How many villages had 21.7% of slovenes in 1991?
A: SELECT COUNT Village (German) FROM 1-10797463-1 WHERE Percent of Slovenes 1991 = '21.7%'