Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_91 (round INTEGER, nationality VARCHAR, pick VARCHAR)
### Question:
What is the sum of Round, when Nationality is "United States", and when Pick is "125"?
### Answer:
SELECT SUM(round) FROM table_name_91 WHERE nationality = "united states" AND pick = 125