Question: Millennium Force is a steel roller coaster that was the 14th roller coaster to be built at Cedar Point amusement park, since what wooden roller coaster opened to the public on May 23, 1964?
Sentence (from "Blue Streak (Cedar Point)"): Built by Philadelphia Toboggan Company, Blue Streak opened to the public on May 23, 1964, and is the park's oldest roller coaster.
Relevant evidence: Yes