user: Question: Which lead had a season of 2009-10?
Columns: ['Season', 'Skip', 'Third', 'Second', 'Lead', 'Alternate', 'Events']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['2002-03', 'Xu Xiaoming', 'Wang Fengchun', 'Yu Zhu', 'Liu Rui', 'Ma Yongjun', '2002 PCC']
SQL:

assistant: SELECT "Lead" FROM "Table" WHERE "Season" = '2009-10';