What is the sum of Year opened when steel was the material with a Span feet of 1476?
CREATE TABLE table_name_75 (year_opened INTEGER, material VARCHAR, span_feet VARCHAR)
SELECT SUM(year_opened) FROM table_name_75 WHERE material = "steel" AND span_feet = 1476
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_75 (year_opened INTEGER, material VARCHAR, span_feet VARCHAR) Question: What is the sum of Year opened when steel was the material with a Span feet of 1476? [/INST] SELECT SUM(year_opened) FROM table_name_75 WHERE material = "steel" AND span_feet = 1476 </s>