user: ### NOW ANSWER:
Question: What is the Prince XML value for the engine that has a Gecko value of 'No' and webkit value of 'Nightly build'?
Columns: ['Trident', 'Gecko', 'WebKit', 'KHTML', 'Presto', 'Prince XML']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['7.0', '1.0', '85', 'Yes', '1.0', 'Yes']
SQL:

assistant: SELECT "Prince XML" FROM "Table" WHERE "Gecko" = 'No' AND "WebKit" = 'Nightly build';