user: Question: what is the total number of date where visitor is New Jersey Nets
Columns: ['#', 'Date', 'Visitor', 'Score', 'Home', 'Leading scorer', 'Attendance', 'Record', 'Streak']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [2.0, 'November 2', 'Portland Trail Blazers', 'L 93–113', 'New Orleans Hornets', 'Roy : 23', 'New Orleans Arena 9,817', '0–2', 'L2']
SQL:

assistant: SELECT COUNT("Date") FROM "Table" WHERE "Visitor" = 'New Jersey Nets';