CREATE TABLE table_1720 ("COMPANY NAME" CLOB, "Holding Companies" FLOAT, "Subsidiaries" FLOAT, "Description of activities" CLOB, "Parent  ( holding )  company" CLOB)

How many companies have Postermobile Limited as a parent company?
SELECT COUNT("COMPANY NAME") FROM table_1720 WHERE "Parent (holding) company" = 'POSTERMOBILE LIMITED'
SELECT COUNT("COMPANY NAME") FROM "table_1720" WHERE "Parent (holding) company" = 'POSTERMOBILE LIMITED'