Run the statement in the right panel.
Quotes don't matter in XQuery. You can use either double quote "quotes" to surround a string, or single quotes 'quotes'. You just need to make sure that the string is properly delimited. Quotes can be contained within strings by using one of two methods. You can either use different quotes to surround the quote character, as in "'", or use two quotes together to represent one quote, as in ''''.
You should see a result in the lower right panel.