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_20 (school VARCHAR, round VARCHAR, pick VARCHAR, position VARCHAR)
### Question:
Which school picked a back in round 16, after pick 89?
### Answer:
SELECT school FROM table_name_20 WHERE pick > 89 AND position = "back" AND round = 16