How many numbers were recorde under 50s when there was 2 matches?
{'header': ['Player', 'Team', 'Matches', 'Innings', 'Runs', 'Average', 'Highest Score', '100s', '50s'], 'page_title': '1948 Ashes series', 'page_id': '', 'types': ['text', 'text', 'real', 'real', 'real', 'text', 'text', 'real', 'real'], 'id': '1-16570286-2', 'section_title': 'Best batting averages', 'caption': 'Best batting averages', 'rows': [['Arthur Morris', 'Australia', '5', '9', '696', '87.00', '196', '3', '3'], ['Sid Barnes', 'Australia', '4', '6', '329', '82.25', '141', '1', '3'], ['Donald Bradman', 'Australia', '5', '9', '508', '72.57', '173*', '2', '1'], ['Neil Harvey', 'Australia', '2', '3', '133', '66.50', '112', '1', '0'], ['Denis Compton', 'England', '5', '10', '562', '62.44', '184', '2', '2'], ['Cyril Washbrook', 'England', '4', '8', '356', '50.85', '143', '1', '2'], ['Sam Loxton', 'Australia', '3', '3', '144', '48.00', '93', '0', '1'], ['Lindsay Hassett', 'Australia', '5', '8', '310', '44.28', '137', '1', '0']], 'name': 'table_16570286_2'}