When aspect computing is the yacht what is the sail number?
{'header': ['Position', 'Sail Number', 'Yacht', 'State/Country', 'Yacht Type', 'LOA (Metres)', 'Skipper', 'Elapsed Time d:hh:mm:ss'], 'page_title': '1998 Sydney to Hobart Yacht Race', 'page_id': '', 'types': ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text'], 'id': '1-1858574-2', 'section_title': 'Line Honours Results (Top 10)', 'caption': 'Line Honours Results (Top 10)', 'rows': [['1', 'US17', 'Sayonara', 'USA', 'Farr ILC Maxi', '24.13', 'Larry Ellison', '2:19:03:32'], ['2', 'C1', 'Brindabella', 'NSW', 'Jutson 79', '24.07', 'George Snow', '2:21:55:06'], ['3', 'YC1000', 'Ausmaid', 'SA', 'Farr 47', '14.24', 'Kevan Pearce', '3:06:02:29'], ['4', 'AUS70', 'Ragamuffin', 'NSW', 'Farr 50', '15.15', 'Syd Fischer', '3:06:11:29'], ['5', 'COK1', 'Nokia', 'CI', 'Farr Ketch Maxi', '25.20', 'David Witt', '3:09:19:00'], ['6', 'SM1', 'Fudge', 'VIC', 'Elliot 56', '17.07', 'Peter Hansen', '3:11:00:26'], ['7', '6606', 'Quest', 'NSW', 'Nelson Marek 46', '14.12', 'Bob Steel', '3:14:41:28'], ['8', '9090', 'Industrial Quest', 'QLD', 'Nelson Marek 43', '13.11', 'Kevin Miller', '3:14:58:46'], ['9', '4826', 'Aspect Computing', 'NSW', 'Radford 16.5 Sloop', '16.50', 'David Pescud', '3:15:28:24']], 'name': 'table_1858574_2'}