In how many counties is there a street called Appian Way?
a street called Appian Way refers to street_name = 'appian way'
SELECT COUNT(DISTINCT T2.county) FROM location AS T1 INNER JOIN geographic AS T2 ON T1.city = T2.city WHERE T1.street_name = 'appian way'
database name:db_id restaurant
geographic table geographic Cols: city dtype text, country dtype text, region dtype text, 
generalinfo table generalinfo Cols: id restaurant dtype integer, label dtype text, food type dtype text, city dtype text, review dtype real, 
location table location Cols: id restaurant dtype integer, street number dtype integer, street name dtype text, city dtype text, 
