Question: What is the name of the steel roller coaster located at Blackpool Pleasure Beach which is faster than another that is located at Alton Towers called Oblivion which is ranked the third fastest in the UK? 
Sentence (from "Oblivion (roller coaster)"): It was the second in a long line of 'Secret Weapon (SW4)' rollercoasters to have opened at Alton Towers.
Relevant evidence: No