How many matches were held at the venue named "Newlands"?
the venue named "Newlands" refers to Venue_Name = 'Newlands'
SELECT SUM(CASE WHEN T2.Venue_Name = 'Newlands' THEN 1 ELSE 0 END) FROM Match AS T1 INNER JOIN Venue AS T2 ON T2.Venue_Id = T1.Venue_Id