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_23963781_3 (position VARCHAR, nationality VARCHAR, minutes VARCHAR)
### Question:
What is the position of the player who is from the United States and has 30 minutes? 
### Answer:
SELECT position FROM table_23963781_3 WHERE nationality = "United States" AND minutes = 30