How many Yelp_Businesses do not provide alcohol?
do not provide alcohol refers to attribute_name = 'Alcohol'and attribute_value = 'none'

SELECT COUNT(T1.attribute_id) FROM Attributes AS T1 INNER JOIN Business_Attributes AS T2 ON T1.attribute_id = T2.attribute_id WHERE T1.attribute_name LIKE 'Alcohol' AND T2.attribute_value LIKE 'none'