user: Question: What is the 1979 number for standing rock indian reservation when the 1989 is less than 54.9?
Columns: ['Reservation', 'Location', '1969', '1979', '1989', '2000']
Types: ['text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['Navajo Indian Reservation', 'Arizona, New Mexico, and Utah', 62.1, 47.3, 54.2, 46.5]
SQL:

assistant: SELECT "1979" FROM "Table" WHERE "Reservation" = 'standing rock indian reservation' AND "1989" < 54.9;