CREATE TABLE table_35775 ("Rank" FLOAT, "Building" TEXT, "City" TEXT, "Height  ( m/ft ) " TEXT, "Built" FLOAT)

What city is the bucharest tower center (btc) located in?
SELECT "City" FROM table_35775 WHERE "Building" = 'bucharest tower center (btc)'
SELECT "City" FROM "table_35775" WHERE "Building" = 'bucharest tower center (btc)'