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_22 (year INTEGER, location VARCHAR, eruptions VARCHAR)
### Question:
How many years have a Location of pacific ring of fire, and Eruptions of pinatubo?
### Answer:
SELECT SUM(year) FROM table_name_22 WHERE location = "pacific ring of fire" AND eruptions = "pinatubo"