Among the businesses in Scottsdale, list the attribute of the business with a high review count.
"Scottsdale" is the name of city; high review count refers to review_count = 'High'; attribute of the business refers to attribute_name
SELECT T3.attribute_name FROM Business AS T1 INNER JOIN Business_Attributes AS T2 ON T1.business_id = T2.business_id INNER JOIN Attributes AS T3 ON T2.attribute_id = T3.attribute_id WHERE T1.review_count LIKE 'High' AND T1.city LIKE 'Scottsdale' GROUP BY T3.attribute_name