user: Question: What is the launch site of the Delta IV rocket with an Unknown date and a GPS IIF-10 satellite?
Columns: ['Date', 'Rocket', 'Type', 'Launch site', 'Satellite']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['2013-10-23', 'Delta IV', 'M+(4,2)', 'CCAFS SLC-37B', 'GPS IIF-5']
SQL:

assistant: SELECT "Launch site" FROM "Table" WHERE "Date" = 'Unknown' AND "Rocket" = 'Delta IV' AND "Satellite" = 'GPS IIF-10';