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_88 (years_of_operation VARCHAR, client VARCHAR)
### Question:
What years was soc a client?
### Answer:
SELECT years_of_operation FROM table_name_88 WHERE client = "soc"