CREATE TABLE table_name_66 (erp_w INT, city_of_license VARCHAR)

What is the smallest ERP for allentown, pennsylvania?
SELECT MIN(erp_w) FROM table_name_66 WHERE city_of_license = "allentown, pennsylvania"
SELECT MIN("erp_w") FROM "table_name_66" WHERE "allentown, pennsylvania" = "city_of_license"