CREATE TABLE Services (Workshop_Group_ID VARCHAR, Product_Name VARCHAR)
CREATE TABLE Drama_Workshop_Groups (Store_Phone VARCHAR, Store_Email_Address VARCHAR, Workshop_Group_ID VARCHAR)

What are the names of workshop groups in which services with product name 'film' are performed?
SELECT T1.Store_Phone, T1.Store_Email_Address FROM Drama_Workshop_Groups AS T1 JOIN Services AS T2 ON T1.Workshop_Group_ID = T2.Workshop_Group_ID WHERE T2.Product_Name = "film"
SELECT "T1"."Store_Phone", "T1"."Store_Email_Address" FROM "Drama_Workshop_Groups" AS "T1" JOIN "Services" AS "T2" ON "T1"."Workshop_Group_ID" = "T2"."Workshop_Group_ID" AND "T2"."Product_Name" = "film"