How many times has the playoff been 1 in the contest for the afc cup?
{'header': ['Pos', 'Member Association', 'Points (total 500)', 'Clubs', 'Group stage', 'Play-off', 'AFC Cup'], 'page_title': '', 'section_title': '', 'caption': '', 'rows': [['4', 'Saudi Arabia', '365', '12', '4', '0', '0'], ['5', 'UAE', '356', '12', '3', '1', '0'], ['7', 'Iran', '340', '18', '4', '0', '0'], ['9', 'Uzbekistan', '289', '16', '2', '0', '1'], ['10', 'Qatar', '270', '10', '2', '0', '0']]}