Question: What is the name of the artist that went on The Red Tour and featured the album who's title was inspired by the semi-toxic relationships of the artist?
Sentence (from "The Red Tour"): Launched in support of Swift's fourth studio album, "Red" (2012), the tour began on March 13, 2013 in Omaha, Nebraska and concluded on June 12, 2014 in Singapore.
Relevant evidence: Yes