Here are some possibilities depending on the full sentence:
* "Is on the...": If it's part of a sentence like "La pomme est sur la table" (The apple is on the table), then "est sur la" translates to "is on the".
* "Is at the...": If it's part of a sentence like "Le livre est sur la table" (The book is at the table), then "est sur la" translates to "is at the".
* "Is about the...": If it's part of a sentence like "Le film est sur la guerre" (The movie is about the war), then "est sur la" translates to "is about the".
Without more context, it's impossible to give a definitive translation.
Please provide the full sentence so I can give you the most accurate translation.