CREATE TABLE table_1756264_2 (subsidiaries NUMBER, company_name VARCHAR2)

How many subsidiaries are there of Postermobile Advertising Limited?
SELECT MIN(subsidiaries) FROM table_1756264_2 WHERE company_name = "POSTERMOBILE ADVERTISING LIMITED"
SELECT MIN("subsidiaries") FROM "table_1756264_2" WHERE "POSTERMOBILE ADVERTISING LIMITED" = "company_name"