The Arthur Ravenel Jr. Bridge across the Cooper River opened on July 16, 2005, and was the second-longest cable-stayed bridge in the Americas at the time of its construction.[citation needed] The bridge links Mount Pleasant with downtown Charleston, and has eight lanes plus a 12-foot lane shared by pedestrians and bicycles. It replaced the Grace Memorial Bridge (built in 1929) and the Silas N. Pearman Bridge (built in <answer>1966</answer>). They were considered two of the more dangerous bridges in America and were demolished after the Ravenel Bridge opened.
What year was the Silas N. Pearman Bridge built?
1966