CREATE TABLE phone_market (Market_ID VARCHAR2, Phone_ID VARCHAR2)
CREATE TABLE market (Market_ID VARCHAR2, Num_of_shops NUMBER)
CREATE TABLE phone (Name VARCHAR2, Phone_ID VARCHAR2)

Show the names of phones that are on market with number of shops greater than 50.
SELECT T3.Name FROM phone_market AS T1 JOIN market AS T2 ON T1.Market_ID = T2.Market_ID JOIN phone AS T3 ON T1.Phone_ID = T3.Phone_ID WHERE T2.Num_of_shops > 50
SELECT "T3"."Name" FROM "phone_market" "T1" JOIN "market" "T2" ON "T1"."Market_ID" = "T2"."Market_ID" AND "T2"."Num_of_shops" > 50 JOIN "phone" "T3" ON "T1"."Phone_ID" = "T3"."Phone_ID"