Name the number of horizontal when framerate hz is 25
{'header': ['Vertical', 'Horizontal', 'Aspect ratio', 'Pixel aspect ratio', 'Form of scanning', 'Framerate ( Hz )'], 'page_title': '', 'page_id': '', 'types': ['real', 'real', 'text', 'text', 'text', 'text'], 'id': '1-15928363-1', 'section_title': '', 'caption': '', 'rows': [['576', '352', '4:3 or 16:9', 'non-square', 'interlaced', '25 (50 fields/s)'], ['576', '352', '4:3 or 16:9', 'non-square', 'progressive', '25'], ['576', '480', '4:3 or 16:9', 'non-square', 'interlaced', '25 (50 fields/s)'], ['576', '480', '4:3 or 16:9', 'non-square', 'progressive', '25'], ['576', '544', '4:3 or 16:9', 'non-square', 'interlaced', '25 (50 fields/s)'], ['576', '544', '4:3 or 16:9', 'non-square', 'progressive', '25'], ['576', '720', '4:3 or 16:9', 'non-square', 'interlaced', '25 (50 fields/s)']], 'name': 'table_15928363_1'}