What was the lowest highest attendance for the dumbarton team?
{'header': ['Team', 'Stadium', 'Capacity', 'Highest', 'Lowest', 'Average'], 'page_title': '2007–08 Scottish Third Division', 'section_title': 'Stadia and attendances', 'caption': 'Stadia and attendances', 'rows': [['East Fife', 'Bayview Stadium', '2000', '1300', '540', '769'], ['Arbroath', 'Gayfield Park', '6488', '959', '421', '611'], ['Montrose', 'Links Park', '3292', '1470', '321', '597'], ['Dumbarton', 'Strathclyde Homes Stadium', '2025', '907', '258', '559'], ['Elgin City', 'Borough Briggs', '3927', '624', '301', '471'], ['Stenhousemuir', 'Ochilview Park', '3776', '755', '212', '414'], ['Forfar Athletic', 'Station Park', '5177', '615', '270', '410'], ['East Stirlingshire', 'Firs Park', '1800', '791', '235', '377'], ['Albion Rovers', 'Cliftonhill', '1249', '512', '186', '307']]}