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_8 (height_of_bridge_structure VARCHAR, opened VARCHAR, name VARCHAR)
### Question:
How tall is the Anqing Bridge which opened prior to 2011?
### Answer:
SELECT height_of_bridge_structure FROM table_name_8 WHERE opened < 2011 AND name = "anqing bridge"