Vocational training refers to the training and training of the vocational knowledge and practical skills of the person being trained according to the requirements of different professional positions. According to the above definition, which of the following is the following for vocational training? ['A community conducted a concentrated education on the released personnel of "two labors" (labor reform, reeducation through labor) in this district.', "A training institution held a pre-exam training class for students who intend to participate in this year's broadcast host professional college entrance examination.", 'An enterprise educates new employees this year on "I and the company share the same shame" education.', "A city's Human Resources and Social Security Bureau plans to hold a computer training course and a second housekeeping training course in the first half of the year."]