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 people (Age INTEGER, People_ID VARCHAR); CREATE TABLE gymnast (Gymnast_ID VARCHAR)
### Question:
What is the average age of all gymnasts?
### Answer:
SELECT AVG(T2.Age) FROM gymnast AS T1 JOIN people AS T2 ON T1.Gymnast_ID = T2.People_ID